HPE FlexNetwork HSR6600 User manual

HPE FlexNetwork HSR6600 Routers
Comware 7 Layer 3—IP Routing
Configuration Guide
Part number: 5200-3472
Software version: HSR6602-CMW710-R7607
Document version: 6W100-20170412

© Copyright 2017 Hewlett Packard Enterprise Development LP
The information contained herein is subject to change without notice. The only warranties for Hewlett Packard
Enterprise products and services are set forth in the express warranty statements accompanying such
products and services. Nothing herein should be construed as constituting an additional warranty. Hewlett
Packard Enterprise shall not be liable for technical or editorial errors or omissions contained herein.
Confidential computer software. Valid license from Hewlett Packard Enterprise required for possession, use, or
copying. Consistent with FAR 12.211 and 12.212, Commercial Computer Software, Computer Software
Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor’s
standard commercial license.
Links to third-party websites take you outside the Hewlett Packard Enterprise website. Hewlett Packard
Enterprise has no control over and is not responsible for information outside the Hewlett Packard Enterprise
website.
Acknowledgments
Intel®, Itanium®, Pentium®, Intel Inside®, and the Intel Inside logo are trademarks of Intel Corporation in the
United States and other countries.
Microsoft® and Windows® are either registered trademarks or trademarks of Microsoft Corporation in the
United States and/or other countries.
Adobe® andAcrobat® are trademarks ofAdobe Systems Incorporated.
Java and Oracle are registered trademarks of Oracle and/or its affiliates.
UNIX® is a registered trademark of The Open Group.

i
Contents
Configuring basic IP routing································································1
Routing table ····························································································································1
Dynamic routing protocols············································································································2
Route preference ·······················································································································2
Load sharing·····························································································································3
Route backup····························································································································3
Route recursion ·························································································································3
Route redistribution ····················································································································3
Extension attribute redistribution ···································································································3
Setting the maximum lifetime for routes and labels in the RIB ······························································4
Setting the maximum lifetime for routes in the FIB·············································································4
Configuring RIB NSR··················································································································5
Configuring IPv4 RIB NSR ····································································································5
Configuring IPv6 RIB NSR ····································································································5
Configuring inter-protocol FRR······································································································6
Configuring IPv4 RIB inter-protocol FRR ··················································································6
Configuring IPv6 RIB inter-protocol FRR ··················································································6
Displaying and maintaining a routing table·······················································································7
Configuring static routing ···································································9
Configuring a static route ·············································································································9
Configuring BFD for static routes································································································· 10
Bidirectional control mode ··································································································· 10
Single-hop echo mode········································································································ 11
Configuring static route FRR ······································································································ 12
Configuration guidelines ····································································································· 12
Configuration procedure ····································································································· 13
Displaying and maintaining static routes ······················································································· 14
Static route configuration examples ····························································································· 14
Basic static route configuration example················································································· 14
BFD for static routes configuration example (direct next hop)······················································ 16
BFD for static routes configuration example (indirect next hop) ··················································· 18
Static route FRR configuration example ················································································· 21
Configuring a default route ······························································· 24
Configuring RIP ············································································· 25
Overview································································································································ 25
RIP route entries ··············································································································· 25
Routing loop prevention ······································································································ 25
RIP operation ··················································································································· 25
RIP versions····················································································································· 26
Protocols and standards ····································································································· 26
RIP configuration task list ·········································································································· 26
Configuring basic RIP ··············································································································· 27
Enabling RIP ···················································································································· 27
Controlling RIP reception and advertisement on interfaces ························································· 28
Configuring a RIP version ··································································································· 28
Configuring RIP route control······································································································ 29
Configuring an additional routing metric·················································································· 29
Configuring RIPv2 route summarization ················································································· 30
Disabling host route reception ······························································································ 31
Advertising a default route··································································································· 31
Configuring received/redistributed route filtering······································································· 31
Setting a preference for RIP ································································································ 32
Configuring RIP route redistribution ······················································································· 32
Tuning and optimizing RIP networks ···························································································· 33

ii
Configuration prerequisites·································································································· 33
Setting RIP timers ············································································································· 33
Enabling split horizon and poison reverse ··············································································· 34
Setting the maximum number of ECMP routes········································································· 34
Enabling zero field check on incoming RIPv1 messages ···························································· 35
Enabling source IP address check on incoming RIP updates ······················································ 35
Configuring RIPv2 message authentication ············································································· 35
Setting the RIP triggered update interval ················································································ 36
Specifying a RIP neighbor ··································································································· 36
Configuring RIP network management ··················································································· 37
Configuring the RIP packet sending rate················································································· 37
Setting the maximum length of RIP packets ············································································ 38
Configuring RIP GR·················································································································· 38
Enabling RIP NSR···················································································································· 39
Configuring BFD for RIP ············································································································ 39
Configuring single-hop echo detection (for a directly connected RIP neighbor) ······························· 40
Configuring single-hop echo detection (for a specific destination) ················································ 40
Configuring bidirectional control detection··············································································· 40
Configuring RIP FRR ················································································································ 41
Configuration restrictions and guidelines ················································································ 42
Configuration prerequisites·································································································· 42
Configuration procedure ····································································································· 42
Displaying and maintaining RIP··································································································· 43
RIP configuration examples········································································································ 43
Configuring basic RIP········································································································· 43
Configuring RIP route redistribution ······················································································· 46
Configuring an additional metric for a RIP interface··································································· 48
Configuring RIP to advertise a summary route ········································································· 50
Configuring RIP GR ··········································································································· 52
Configuring RIP NSR ········································································································· 53
Configuring BFD for RIP (single-hop echo detection for a directly connected neighbor) ···················· 55
Configuring BFD for RIP (single-hop echo detection for a specific destination)································ 57
Configuring BFD for RIP (bidirectional control detection)···························································· 60
Configuring RIP FRR ········································································································· 63
Configuring OSPF ··········································································66
Overview································································································································ 66
OSPF packets ·················································································································· 66
LSA types ························································································································ 66
OSPF areas ····················································································································· 67
Router types····················································································································· 69
Route types······················································································································ 70
Route calculation··············································································································· 70
OSPF network types ·········································································································· 71
DR and BDR ···················································································································· 71
Protocols and standards ····································································································· 72
OSPF configuration task list ······································································································· 72
Enabling OSPF ······················································································································· 74
Configuration prerequisites·································································································· 74
Configuration guidelines ····································································································· 74
Enabling OSPF on a network ······························································································· 75
Enabling OSPF on an interface ···························································································· 76
Configuring OSPF areas············································································································ 76
Configuring a stub area ······································································································ 76
Configuring an NSSA area ·································································································· 77
Configuring a virtual link······································································································ 78
Configuring OSPF network types································································································· 78
Configuration prerequisites·································································································· 78
Configuring the broadcast network type for an interface····························································· 79
Configuring the NBMA network type for an interface ································································· 79
Configuring the P2MP network type for an interface·································································· 80
Configuring the P2P network type for an interface ···································································· 80

iii
Configuring OSPF route control ·································································································· 80
Configuration prerequisites·································································································· 80
Configuring OSPF route summarization ················································································· 81
Configuring received OSPF route filtering ··············································································· 82
Configuring Type-3 LSA filtering ··························································································· 82
Setting an OSPF cost for an interface ···················································································· 82
Setting the maximum number of ECMP routes········································································· 83
Setting OSPF preference ···································································································· 83
Configuring discard routes for summary networks ···································································· 84
Configuring OSPF route redistribution···················································································· 84
Advertising a host route ······································································································ 86
Advertising OSPF link state information to BGP ······································································· 86
Tuning and optimizing OSPF networks ························································································· 86
Configuration prerequisites·································································································· 86
Setting OSPF timers ·········································································································· 86
Setting LSA transmission delay ···························································································· 87
Setting SPF calculation interval ···························································································· 88
Setting the LSA arrival interval ····························································································· 88
Setting the LSA generation interval ······················································································· 89
Disabling interfaces from receiving and sending OSPF packets··················································· 89
Configuring stub routers······································································································ 90
Configuring OSPF authentication ·························································································· 90
Adding the interface MTU into DD packets·············································································· 91
Setting a DSCP value for OSPF packets ················································································ 91
Setting the maximum number of external LSAs in LSDB ···························································· 92
Setting OSPF exit overflow interval ······················································································· 92
Enabling compatibility with RFC 1583 ···················································································· 92
Logging neighbor state changes ··························································································· 93
Configuring OSPF network management················································································ 93
Setting the LSU transmit rate ······························································································· 94
Enabling OSPF ISPF ········································································································· 94
Configuring prefix suppression ····························································································· 95
Configuring prefix prioritization ····························································································· 96
Configuring OSPF PIC ······································································································· 96
Setting the number of OSPF logs·························································································· 97
Filtering outbound LSAs on an interface ················································································· 97
Filtering LSAs for the specified neighbor················································································· 98
Configuring GTSM for OSPF ······························································································· 98
Configuring OSPF dynamic host name mappings····································································· 99
Configuring OSPF GR··············································································································· 99
Configuring OSPF GR restarter ·························································································· 100
Configuring OSPF GR helper····························································································· 101
Triggering OSPF GR········································································································ 101
Configuring OSPF NSR··········································································································· 102
Configuring BFD for OSPF······································································································· 102
Configuring bidirectional control detection············································································· 102
Configuring single-hop echo detection ················································································· 103
Configuring OSPF FRR ··········································································································· 103
Configuration prerequisites································································································ 103
Configuration guidelines ··································································································· 103
Configuration procedure ··································································································· 104
Displaying and maintaining OSPF ····························································································· 105
OSPF configuration examples ·································································································· 106
Basic OSPF configuration example ····················································································· 106
OSPF route redistribution configuration example···································································· 109
OSPF route summarization configuration example ································································· 111
OSPF stub area configuration example ················································································ 114
OSPF NSSA area configuration example·············································································· 116
OSPF DR election configuration example ············································································· 118
OSPF virtual link configuration example ··············································································· 122
OSPF GR configuration example ························································································ 124
OSPF NSR configuration example ······················································································ 127

iv
BFD for OSPF configuration example ·················································································· 129
OSPF FRR configuration example ······················································································ 132
Troubleshooting OSPF configuration·························································································· 134
No OSPF neighbor relationship established ·········································································· 134
Incorrect routing information ······························································································ 135
Configuring IS-IS·········································································· 136
Overview······························································································································ 136
Terminology ··················································································································· 136
IS-IS address format ········································································································ 136
NET······························································································································ 137
IS-IS area ······················································································································ 138
IS-IS network types·········································································································· 139
IS-IS PDUs ···················································································································· 140
Protocols and standards ··································································································· 142
IS-IS configuration task list······································································································· 143
Configuring basic IS-IS············································································································ 144
Configuration prerequisites································································································ 144
Enabling IS-IS ················································································································ 144
Setting the IS level and circuit level ····················································································· 144
Configuring P2P network type for an interface ······································································· 145
Configuring IS-IS route control ·································································································· 145
Configuration prerequisites································································································ 145
Configuring IS-IS link cost ································································································· 145
Specifying a preference for IS-IS ························································································ 147
Configuring the maximum number of ECMP routes································································· 147
Configuring IS-IS route summarization ················································································· 148
Advertising a default route································································································· 149
Configuring IS-IS route redistribution ··················································································· 149
Configuring IS-IS route filtering··························································································· 150
Configuring IS-IS route leaking··························································································· 151
Advertising IS-IS link state information to BGP······································································· 152
Tuning and optimizing IS-IS networks························································································· 152
Configuration prerequisites································································································ 152
Specifying the interval for sending IS-IS hello packets ····························································· 152
Specifying the IS-IS hello multiplier ····················································································· 153
Specifying the interval for sending IS-IS CSNP packets ··························································· 153
Configuring a DIS priority for an interface ············································································· 153
Enabling source address check for hello packets on a PPP interface·········································· 154
Disabling an interface from sending/receiving IS-IS packets ····················································· 154
Enabling an interface to send small hello packets··································································· 154
Configuring LSP parameters······························································································ 155
Controlling SPF calculation interval ····················································································· 158
Configuring convergence priorities for specific routes ······························································ 159
Setting the LSDB overload bit ···························································································· 160
Configuring the ATT bit····································································································· 160
Configuring the tag value for an interface·············································································· 161
Configuring system ID to host name mappings ······································································ 161
Enabling the logging of neighbor state changes ····································································· 162
Enabling IS-IS ISPF ········································································································· 162
Enabling prefix suppression······························································································· 163
Configuring IS-IS network management ··············································································· 163
Configuring IS-IS PIC ······································································································· 164
Enhancing IS-IS network security ······························································································ 165
Configuration prerequisites································································································ 165
Configuring neighbor relationship authentication ···································································· 165
Configuring area authentication ·························································································· 166
Configuring routing domain authentication ············································································ 166
Configuring IS-IS GR ·············································································································· 167
Configuring IS-IS NSR ············································································································ 168
Configuring BFD for IS-IS ········································································································ 168
Configuring IS-IS FRR ············································································································ 169

v
Configuration prerequisites································································································ 169
Configuration guidelines ··································································································· 169
Configuration procedure ··································································································· 170
Configuring IS-IS MTR ············································································································ 172
Displaying and maintaining IS-IS ······························································································· 173
IS-IS configuration examples ···································································································· 175
Basic IS-IS configuration example······················································································· 175
DIS election configuration example ····················································································· 179
IS-IS route redistribution configuration example ····································································· 183
IS-IS authentication configuration example ··········································································· 187
IS-IS GR configuration example ························································································· 189
IS-IS NSR configuration example························································································ 190
BFD for IS-IS configuration example···················································································· 193
IS-IS FRR configuration example························································································ 196
Configuring BGP ·········································································· 200
Overview······························································································································ 200
BGP speaker and BGP peer ······························································································ 200
BGP message types ········································································································ 200
BGP path attributes ········································································································· 200
BGP route selection ········································································································· 204
BGP route advertisement rules··························································································· 204
BGP load balancing ········································································································· 205
Settlements for problems in large-scale BGP networks···························································· 206
MP-BGP························································································································ 209
BGP multi-instance ·········································································································· 210
BGP configuration views ··································································································· 210
Protocols and standards ··································································································· 212
BGP configuration task list ······································································································· 213
Configuring basic BGP············································································································ 216
Enabling BGP················································································································· 216
Configuring a BGP peer···································································································· 217
Configuring dynamic BGP peers························································································· 219
Configuring a BGP peer group ··························································································· 221
Specifying the source address of TCP connections································································· 231
Generating BGP routes ··········································································································· 233
Injecting a local network···································································································· 233
Redistributing IGP routes ·································································································· 234
Controlling route distribution and reception ·················································································· 236
Configuring BGP route summarization ················································································· 236
Advertising optimal routes in the IP routing table ···································································· 239
Advertising a default route to a peer or peer group ································································· 240
Limiting routes received from a peer or peer group ································································· 242
Configuring BGP route filtering policies ················································································ 244
Configuring BGP route update delay ··················································································· 250
Configuring BGP route dampening ······················································································ 251
Controlling BGP path selection ································································································· 252
Setting a preferred value for routes received ········································································· 252
Configuring preferences for BGP routes ··············································································· 254
Configuring the default local preference ··············································································· 255
Configuring the MED attribute ···························································································· 257
Configuring the NEXT_HOP attribute··················································································· 260
Configuring the AS_PATH attribute ····················································································· 263
Ignoring IGP metrics during optimal route selection ································································ 268
Configuring the SoO attribute····························································································· 269
Tuning and optimizing BGP networks ························································································· 270
Configuring the keepalive interval and hold time····································································· 270
Configuring the interval for sending updates for the same route················································· 272
Enabling BGP to establish an EBGP session over multiple hops ··············································· 273
Enabling immediate re-establishment of direct EBGP connections upon link failure ······················· 274
Enabling 4-byte AS number suppression ·············································································· 274
Enabling MD5 authentication for BGP peers·········································································· 275

vi
Configuring BGP load balancing ························································································· 276
Configuring IPsec for IPv6 BGP·························································································· 278
Disabling BGP to establish a session to a peer or peer group ··················································· 279
Configuring GTSM for BGP ······························································································· 280
Configuring BGP soft-reset································································································ 281
Protecting an EBGP peer when memory usage reaches level 2 threshold ··································· 287
Configuring an update delay for local MPLS labels ································································· 288
Flushing the suboptimal BGP route to the RIB ······································································· 288
Configuring a large-scale BGP network ······················································································ 289
Configuring BGP communities ··························································································· 289
Configuring BGP route reflection ························································································ 291
Configuring a BGP confederation························································································ 294
Configuring BGP GR ·············································································································· 295
Configuring BGP NSR············································································································· 296
Enabling SNMP notifications for BGP ························································································· 296
Enabling logging for session state changes ················································································· 297
Configuring BFD for BGP········································································································· 297
Configuring BGP FRR············································································································· 298
Configuring BGP policy accounting ···························································································· 301
Configuring 6PE ···················································································································· 302
Configuring basic 6PE ······································································································ 303
Configuring optional 6PE capabilities ··················································································· 303
Configuring BGP LS ··············································································································· 305
Configuring basic BGP LS································································································· 305
Configuring BGP LS route reflection ···················································································· 306
Specifying an AS number and a router ID for BGP LS messages··············································· 306
Displaying and maintaining BGP ······························································································· 306
Displaying BGP··············································································································· 306
Resetting BGP sessions ··································································································· 310
Clearing BGP information·································································································· 311
IPv4 BGP configuration examples ····························································································· 311
Basic BGP configuration example ······················································································· 311
BGP and IGP route redistribution configuration example·························································· 316
BGP route summarization configuration example ··································································· 318
BGP load balancing configuration example ··········································································· 321
BGP community configuration example ················································································ 324
BGP route reflector configuration example ············································································ 327
BGP confederation configuration example ············································································ 330
BGP path selection configuration example ············································································ 334
BGP GR configuration example ·························································································· 337
BFD for BGP configuration example ···················································································· 338
BGP FRR configuration example ························································································ 341
Multicast BGP configuration example··················································································· 345
Dynamic BGP peer configuration example ············································································ 348
BGP LS configuration example··························································································· 350
IPv6 BGP configuration examples ····························································································· 353
IPv6 BGP basic configuration example················································································· 353
IPv6 BGP route reflector configuration example ····································································· 356
6PE configuration example································································································ 358
BFD for IPv6 BGP configuration example ············································································· 361
IPsec for IPv6 BGP packets configuration example································································· 365
IPv6 BGP FRR configuration example ················································································· 370
IPv6 multicast BGP configuration example············································································ 373
Troubleshooting BGP·············································································································· 377
Symptom ······················································································································· 377
Analysis ························································································································ 377
Solution························································································································· 377
Configuring PBR ·········································································· 378
Overview······························································································································ 378
Policy···························································································································· 378
PBR and Track ··············································································································· 380

vii
PBR configuration task list ······································································································· 380
Configuring a policy················································································································ 381
Creating a node ·············································································································· 381
Setting match criteria for a node ························································································· 381
Configuring actions for a node···························································································· 381
Configuring PBR···················································································································· 383
Configuring local PBR ······································································································ 383
Configuring interface PBR ································································································· 383
Displaying and maintaining PBR ······························································································· 384
PBR configuration examples ···································································································· 384
Packet type-based local PBR configuration example······························································· 384
Packet type-based interface PBR configuration example ························································· 385
Packet length-based interface PBR configuration example ······················································· 387
Packet source-IP-based interface PBR configuration example ·················································· 389
Configuring IPv6 static routing ························································ 392
Configuring an IPv6 static route ································································································ 392
Configuring BFD for IPv6 static routes ························································································ 392
Bidirectional control mode ································································································· 393
Single-hop echo mode······································································································ 393
Displaying and maintaining IPv6 static routes··············································································· 394
IPv6 static routing configuration examples··················································································· 394
Basic IPv6 static route configuration example ········································································ 394
BFD for IPv6 static routes configuration example (direct next hop) ············································· 396
BFD for IPv6 static routes configuration example (indirect next hop)··········································· 399
Configuring an IPv6 default route····················································· 402
Configuring RIPng ········································································ 403
Overview······························································································································ 403
RIPng route entries·········································································································· 403
RIPng packets ················································································································ 403
Protocols and standards ··································································································· 404
RIPng configuration task list ····································································································· 404
Configuring basic RIPng·········································································································· 404
Configuring RIPng route control ································································································ 405
Configuring an additional routing metric················································································ 405
Configuring RIPng route summarization ··············································································· 405
Advertising a default route································································································· 406
Configuring received/redistributed route filtering····································································· 406
Setting a preference for RIPng ··························································································· 406
Configuring RIPng route redistribution·················································································· 407
Tuning and optimizing the RIPng network ··················································································· 407
Setting RIPng timers ········································································································ 407
Configuring split horizon and poison reverse ········································································· 408
Configuring zero field check on RIPng packets ······································································ 408
Setting the maximum number of ECMP routes······································································· 409
Configuring the RIPng packet sending rate ··········································································· 409
Setting the interval for sending triggered updates ··································································· 409
Configuring RIPng GR ············································································································ 410
Configuring RIPng NSR··········································································································· 411
Configuring RIPng FRR··········································································································· 411
Configuration restrictions and guidelines ·············································································· 412
Configuration prerequisites································································································ 412
Configuration procedure ··································································································· 412
Applying an IPsec profile ········································································································· 412
Displaying and maintaining RIPng ····························································································· 413
RIPng configuration examples ·································································································· 413
Basic RIPng configuration example ····················································································· 413
RIPng route redistribution configuration example···································································· 416
RIPng GR configuration example························································································ 418
RIPng NSR configuration example ······················································································ 419

viii
Configuring RIPng FRR ···································································································· 421
RIPng IPsec profile configuration example ············································································ 424
Configuring OSPFv3 ····································································· 427
Overview······························································································································ 427
OSPFv3 packets ············································································································· 427
OSPFv3 LSA types·········································································································· 427
Protocols and standards ··································································································· 428
OSPFv3 configuration task list ·································································································· 428
Enabling OSPFv3 ·················································································································· 429
Configuring OSPFv3 area parameters ························································································ 430
Configuration prerequisites································································································ 430
Configuring a stub area ···································································································· 430
Configuring an NSSA area ································································································ 431
Configuring an OSPFv3 virtual link······················································································ 431
Configuring OSPFv3 network types ··························································································· 432
Configuration prerequisites································································································ 432
Configuring the OSPFv3 network type for an interface····························································· 432
Configuring an NBMA or P2MP neighbor·············································································· 432
Configuring OSPFv3 route control ····························································································· 433
Configuration prerequisites································································································ 433
Configuring OSPFv3 route summarization ············································································ 433
Configuring OSPFv3 received route filtering ·········································································· 434
Configuring Inter-Area-Prefix LSA filtering············································································· 434
Setting an OSPFv3 cost for an interface ··············································································· 434
Setting the maximum number of OSPFv3 ECMP routes ·························································· 435
Setting a preference for OSPFv3 ························································································ 435
Configuring OSPFv3 route redistribution··············································································· 436
Tuning and optimizing OSPFv3 networks ···················································································· 437
Configuration prerequisites································································································ 437
Setting OSPFv3 timers ····································································································· 437
Setting LSA transmission delay ·························································································· 437
Setting SPF calculation interval ·························································································· 438
Setting the LSA generation interval ····················································································· 438
Setting a DR priority for an interface ···················································································· 439
Ignoring MTU check for DD packets ···················································································· 439
Disabling interfaces from receiving and sending OSPFv3 packets ············································· 439
Enabling the logging of neighbor state changes ····································································· 440
Configuring OSPFv3 network management··········································································· 440
Setting the LSU transmit rate ····························································································· 441
Configuring stub routers···································································································· 441
Configuring prefix suppression ··························································································· 442
Setting the maximum number of OSPFv3 logs······································································· 443
Configuring OSPFv3 GR ········································································································· 443
Configuring GR restarter ··································································································· 443
Configuring GR helper······································································································ 444
Triggering OSPFv3 GR····································································································· 444
Configuring OSPFv3 NSR········································································································ 444
Configuring BFD for OSPFv3···································································································· 445
Configuring OSPFv3 FRR········································································································ 445
Configuration prerequisites································································································ 446
Configuration guidelines ··································································································· 446
Configuration procedure ··································································································· 446
Applying an IPsec profile ········································································································· 448
Displaying and maintaining OSPFv3 ·························································································· 449
OSPFv3 configuration examples ······························································································· 450
OSPFv3 stub area configuration example ············································································· 450
OSPFv3 NSSA area configuration example ·········································································· 455
OSPFv3 DR election configuration example ·········································································· 457
OSPFv3 route redistribution configuration example································································· 460
OSPFv3 route summarization configuration example ······························································ 463
OSPFv3 GR configuration example ····················································································· 467

ix
OSPFv3 NSR configuration example ··················································································· 468
BFD for OSPFv3 configuration example ··············································································· 469
OSPFv3 FRR configuration example ··················································································· 471
OSPFv3 IPsec profile configuration example ········································································· 474
Configuring IPv6 IS-IS··································································· 479
Overview······························································································································ 479
Configuring basic IPv6 IS-IS····································································································· 479
Configuring IPv6 IS-IS route control ··························································································· 480
Configuring IPv6 IS-IS link cost ·························································································· 481
Tuning and optimizing IPv6 IS-IS networks·················································································· 482
Configuration prerequisites································································································ 482
Assigning a convergence priority to IPv6 IS-IS routes······························································ 482
Setting the LSDB overload bit ···························································································· 483
Configuring a tag value on an interface ················································································ 483
Controlling SPF calculation interval ····················································································· 483
Enabling IPv6 IS-IS ISPF ·································································································· 484
Enabling prefix suppression······························································································· 484
Configuring BFD for IPv6 IS-IS ································································································· 484
Configuring IPv6 IS-IS FRR······································································································ 485
Configuration prerequisites································································································ 485
Configuration procedure ··································································································· 486
Enabling IPv6 IS-IS MTR ········································································································· 487
Displaying and maintaining IPv6 IS-IS ························································································ 488
IPv6 IS-IS configuration examples ····························································································· 488
IPv6 IS-IS basic configuration example ················································································ 488
BFD for IPv6 IS-IS configuration example ············································································· 493
IPv6 IS-IS FRR configuration example ················································································· 495
Configuring IPv6 PBR ··································································· 499
Overview······························································································································ 499
Policy···························································································································· 499
PBR and Track ··············································································································· 501
IPv6 PBR configuration task list ································································································ 501
Configuring an IPv6 policy ······································································································· 502
Creating an IPv6 node······································································································ 502
Setting match criteria for an IPv6 node················································································· 502
Configuring actions for an IPv6 node ··················································································· 502
Configuring IPv6 PBR ············································································································· 504
Configuring IPv6 local PBR ······························································································· 504
Configuring IPv6 interface PBR ·························································································· 504
Displaying and maintaining IPv6 PBR························································································· 505
IPv6 PBR configuration examples······························································································ 505
Packet type-based IPv6 local PBR configuration example ························································ 505
Packet type-based IPv6 interface PBR configuration example··················································· 506
Packet length-based IPv6 interface PBR configuration example ················································ 508
Configuring routing policies ···························································· 512
Overview······························································································································ 512
Filters ··························································································································· 512
Routing policy················································································································· 513
Configuring filters··················································································································· 513
Configuration prerequisites································································································ 513
Configuring an IP prefix list································································································ 513
Configuring an AS path list ································································································ 514
Configuring a community list ······························································································ 514
Configuring an extended community list ··············································································· 515
Configuring a MAC list······································································································ 515
Configuring a routing policy ······································································································ 515
Configuration prerequisites································································································ 515
Creating a routing policy ··································································································· 515
Configuring if-match clauses······························································································ 516

x
Configuring apply clauses ································································································· 517
Configuring the continue clause·························································································· 519
Displaying and maintaining the routing policy ··············································································· 519
Routing policy configuration examples························································································ 520
Routing policy configuration example for IPv4 route redistribution ·············································· 520
Routing policy configuration example for IPv6 route redistribution ·············································· 523
Configuring MTR·········································································· 525
Overview······························································································································ 525
Work mechanism ············································································································ 525
Supported features ·········································································································· 525
Configuring MTR ··················································································································· 525
Displaying and maintaining MTR ······························································································· 527
Configuring DCN·········································································· 528
Overview······························································································································ 528
Basic concepts ··············································································································· 528
Basic features················································································································· 528
DCN configuration task list ······································································································· 528
Enabling DCN················································································································· 529
Configuring the NE ID and NE IP ························································································ 529
Configuring DCN VPN ······································································································ 529
Enabling the automatic report feature ·················································································· 530
Configuring the source MAC address of LLDP frames ····························································· 530
Advertising the LLDP management address·········································································· 530
Enabling the system to generate ARP entries for received management address LLDP TLVs·········· 531
DCN configuration examples ···································································································· 531
Document conventions and icons ···················································· 538
Conventions ························································································································· 538
Network topology icons ··········································································································· 539
Support and other resources ·························································· 540
Accessing Hewlett Packard Enterprise Support ············································································ 540
Accessing updates ················································································································· 540
Websites ······················································································································· 541
Customer self repair········································································································· 541
Remote support ·············································································································· 541
Documentation feedback ·································································································· 541
Index ························································································· 543

1
Configuring basic IP routing
IP routing directs IP packet forwarding on routers based on a routing table. This chapter focuses on
unicast routing protocols. For more information about multicast routing protocols, see IP Multicast
Configuration Guide.
Routing table
A RIB contains the global routing information and related information, including route recursion, route
redistribution, and route extension information. The router selects optimal routes from the routing
table and puts them into the FIB table. It uses the FIB table to forward packets. For more information
about the FIB table, see Layer 3—IP Services Configuration Guide.
Table 1 categorizes routes by different criteria.
Table 1 Route categories
Criterion Categories
Destination
•Network route—The destination is a network. The subnet mask is less than 32
bits.
•Host route—The destination is a host. The subnet mask is 32 bits.
Whether the
destination is directly
connected
•Direct route—The destination is directly connected.
•Indirect route—The destination is indirectly connected.
Origin
•Direct route—A direct route is discovered by the data link protocol on an
interface, and is also called an interface route.
•Static route—A static route is manually configured by an administrator.
•Dynamic route—A dynamic route is dynamically discovered by a routing
protocol.
To view brief information about a routing table, use the display ip routing-table command.
<Sysname> display ip routing-table
Destinations : 19 Routes : 19
Destination/Mask Proto Pre Cost NextHop Interface
0.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
1.1.1.0/24 Direct 0 0 1.1.1.1 GE1/1/1
1.1.1.0/32 Direct 0 0 1.1.1.1 GE1/1/1
1.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
1.1.1.255/32 Direct 0 0 1.1.1.1 GE1/1/1
2.2.2.0/24 Static 60 0 12.2.2.2 GE1/1/2
80.1.1.0/24 OSPF 10 2 80.1.1.1 GE1/1/3
...
A route entry includes the following key items:
•Destination—IP address of the destination host or network.
•Mask—Mask length of the IP address.
•Proto—Protocol that installed the route.
•Pre—Preference of the route. Among routes to the same destination, the route with the highest
preference is optimal.

2
•Cost—If multiple routes to a destination have the same preference, the one with the smallest
cost is the optimal route.
•NextHop—Next hop.
•Interface—Output interface.
Dynamic routing protocols
Static routes work well in small, stable networks. They are easy to configure and require fewer
system resources. However, in networks where topology changes occur frequently, a typical practice
is to configure a dynamic routing protocol. Compared with static routing, a dynamic routing protocol
is complicated to configure, requires more router resources, and consumes more network resources.
Dynamic routing protocols dynamically collect and report reachability information to adapt to
topology changes. They are suitable for large networks.
Dynamic routing protocols can be classified by different criteria, as shown in Table 2.
Table 2 Categories of dynamic routing protocols
Criterion Categories
Operation scope
•IGPs—Work within an AS. Examples include RIP, OSPF, and IS-IS.
•EGPs—Work between ASs. The most popular EGP is BGP.
Routing algorithm
•Distance-vector protocols—Examples include RIP and BGP. BGP is also
considered a path-vector protocol.
•Link-state protocols—Examples include OSPF and IS-IS.
Destination address
type
•Unicast routing protocols—Examples include RIP, OSPF, BGP, and IS-IS.
•Multicast routing protocols—Examples include PIM-SM and PIM-DM.
IP version
•IPv4 routing protocols—Examples include RIP, OSPF, BGP, and IS-IS.
•IPv6 routing protocols—Examples include RIPng, OSPFv3, IPv6 BGP, and
IPv6 IS-IS.
An AS refers to a group of routers that use the same routing policy and work under the same
administration.
Route preference
Routing protocols, including static and direct routing, each by default have a preference. If they find
multiple routes to the same destination, the router selects the route with the highest preference as
the optimal route.
The preference of a direct route is always 0 and cannot be changed. You can configure a preference
for each static route and each dynamic routing protocol. The following table lists the route types and
default preferences. The smaller the value, the higher the preference.
Table 3 Route types and default route preferences
Route type Preference
Direct route 0
Multicast static route 1
OSPF 10
IS-IS 15
Unicast static route 60

3
Route type Preference
RIP 100
OSPF ASE 150
OSPF NSSA 150
IBGP 255
EBGP 255
Unknown (route from an untrusted source) 256
Load sharing
A routing protocol might find multiple optimal equal-cost routes to the same destination. You can use
these routes to implement equal-cost multi-path (ECMP) load sharing.
Static routing, IPv6 static routing, RIP, RIPng, OSPF, OSPFv3, BGP, IPv6 BGP, IS-IS, and IPv6 IS-IS
support ECMP load sharing.
Route backup
Route backup can improve network availability. Among multiple routes to the same destination, the
route with the highest priority is the primary route and others are secondary routes.
The router forwards matching packets through the primary route. When the primary route fails, the
route with the highest preference among the secondary routes is selected to forward packets. When
the primary route recovers, the router uses it to forward packets.
Route recursion
To use a BGP, static, or RIP route that has an indirectly connected next hop, a router must perform
route recursion to find the output interface to reach the next hop.
Link-state routing protocols, such as OSPF and IS-IS, do not need route recursion, because they
obtain directly connected next hops through route calculation.
The RIB records and saves route recursion information, including brief information about related
routes, recursive paths, and recursion depth.
Route redistribution
Route redistribution enables routing protocols to learn routing information from each other. A
dynamic routing protocol can redistribute routes from other routing protocols, including direct and
static routing. For more information, see the respective chapters on those routing protocols in this
configuration guide.
The RIB records redistribution relationships of routing protocols.
Extension attribute redistribution
Extension attribute redistribution enables routing protocols to learn route extension attributes from
each other, including BGP extended community attributes, OSPF area IDs, route types, and router
IDs.

4
The RIB records extended attributes of each routing protocol and redistribution relationships of
different routing protocol extended attributes.
Setting the maximum lifetime for routes and labels
in the RIB
Perform this task to prevent routes of a certain protocol from being aged out due to slow protocol
convergence resulting from a large number of route entries or long GR period.
The configuration takes effect at the next protocol or RIB process switchover.
To set the maximum lifetime for routes and labels in the RIB (IPv4):
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter RIB view. rib N/A
3. Create a RIB IPv4 address
family and enter its view. address-family ipv4 By default, no RIB IPv4
address family exists.
4. Set the maximum lifetime for
IPv4 routes and labels in the
RIB.
protocol protocol [ instance
instance-name ] lifetime seconds
By default, the maximum
lifetime for routes and labels
in the RIB is 480 seconds.
To set the maximum route lifetime for routes and labels in the RIB (IPv6):
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter RIB view. rib N/A
3. Create a RIB IPv6 address
family and enter its view. address-family ipv6 By default, no RIB IPv6
address family exists.
4. Set the maximum lifetime for
IPv6 routes and labels in the
RIB.
protocol protocol [ instance
instance-name ] lifetime seconds
By default, the maximum
lifetime for routes and labels
in the RIB is 480 seconds.
Setting the maximum lifetime for routes in the FIB
When GR or NSR is disabled, FIB entries must be retained for some time after a protocol process
switchover or RIB process switchover. When GR or NSR is enabled, FIB entries must be removed
immediately after a protocol or RIB process switchover to avoid routing issues. Perform this task to
meet such requirements.
To set the maximum lifetime for routes in the FIB (IPv4):
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter RIB view. rib N/A
3. Create a RIB IPv4 address
family and enter its view. address-family ipv4 By default, no RIB IPv4
address family exists.

5
Step Command Remarks
4. Set the maximum lifetime for
IPv4 routes in the FIB. fib lifetime seconds By default, the maximum
lifetime for routes in the FIB
is 600 seconds.
To set the maximum lifetime for routes in the FIB (IPv6):
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter RIB view. rib N/A
3. Create a RIB IPv6 address
family and enter its view. address-family ipv6 By default, no RIB IPv6
address family exists.
4. Set the maximum lifetime for
IPv6 routes in the FIB. fib lifetime seconds By default, the maximum
lifetime for routes in the FIB
is 600 seconds.
Configuring RIB NSR
IMPORTANT:
Use this feature with protocol GR or NSR to avoid route timeouts and traffic interruption.
When an active/standby switchover occurs, nonstop routing (NSR) backs up routing information
from the active process to the standby process to avoid routing flapping and ensure forwarding
continuity.
RIB NSR provides faster route convergence than protocol NSR during an active/standby switchover.
Configuring IPv4 RIB NSR
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter RIB view. rib N/A
3. Create a RIB IPv4 address
family and enter its view. address-family ipv4 By default, no RIB IPv4
address family exists.
4. Enable IPv4 RIB NSR. non-stop-routing By default, RIB NSR is
disabled.
Configuring IPv6 RIB NSR
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter RIB view. rib N/A
3. Create a RIB IPv6 address
family and enter its view. address-family ipv6 By default, no RIB IPv6
address family exists.

6
Step Command Remarks
4. Enable IPv6 RIB NSR. non-stop-routing By default, RIB NSR is
disabled.
Configuring inter-protocol FRR
CAUTION:
This feature uses the next hop of a route from a different protocol as the backup next hop for the
faulty route, which might cause loops.
Inter-protocol fast reroute (FRR) enables fast rerouting between routes of different protocols to
reduce the service interruption time caused by unreachable next hops.
Among the routes to the same destination in the RIB, a router adds the route with the highest
preference to the FIB table. For example, if a static route and an OSPF route in the RIB have the
same destination, the router adds the OSPF route to the FIB table by default. The next hop of the
static route is selected as the backup next hop for the OSPF route. When the next hop of the OSPF
route is unreachable, the backup next hop is used.
Configuring IPv4 RIB inter-protocol FRR
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter RIB view. rib N/A
3. Create a RIB IPv4 address
family and enter its view. address-family ipv4 By default, no RIB IPv4
address family exists.
4. Enable IPv4 RIB
inter-protocol FRR. inter-protocol fast-reroute
[ vpn-instance vpn-instance-name ]
By default, inter-protocol
FRR is disabled.
If you do not specify a VPN
instance, inter-protocol FRR
is enabled for the public
network.
Configuring IPv6 RIB inter-protocol FRR
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter RIB view. rib N/A
3. Create a RIB IPv6 address
family and enter its view. address-family ipv6 By default, no RIB IPv6
address family exists.
4. Enable IPv6 RIB
inter-protocol FRR. inter-protocol fast-reroute
[ vpn-instance vpn-instance-name ]
By default, inter-protocol
FRR is disabled.
If you do not specify a VPN
instance, inter-protocol FRR
is enabled for the public
network.

7
Displaying and maintaining a routing table
Execute display commands in any view and reset commands in user view.
Task Command
Display routing table information. display ip routing-table [ topology topo-name | vpn-instance
vpn-instance-name ] [ verbose ]
Display information about routes
permitted by an IPv4 basic ACL.
display ip routing-table [ topology topo-name | vpn-instance
vpn-instance-name ] acl ipv4-acl-number [ verbose ]
Display information about routes to a
specific destination address.
display ip routing-table [ topology topo-name | vpn-instance
vpn-instance-name ] ip-address [ mask |mask-length ]
[ longer-match ] [ verbose ]
Display information about routes to a
range of destination addresses.
display ip routing-table [ topology topo-name | vpn-instance
vpn-instance-name ] ip-address1 to ip-address2 [ verbose ]
Display information about routes
permitted by an IP prefix list.
display ip routing-table [ topology topo-name | vpn-instance
vpn-instance-name ] prefix-list prefix-list-name [ verbose ]
Display information about routes
installed by a protocol.
display ip routing-table [ topology topo-name | vpn-instance
vpn-instance-name ] protocol protocol [ inactive | verbose ]
Display IPv4 route statistics. display ip routing-table [ topology topo-name | vpn-instance
vpn-instance-name ] statistics
Display brief IPv4 routing table
information.
display ip routing-table [ topology topo-name | vpn-instance
vpn-instance-name ] summary
Display route attribute information in
the RIB. display rib attribute [ attribute-id ]
Display RIB GR state information. display rib graceful-restart
Display next hop information in the
RIB.
display rib nib [ self-originated ] [ nib-id ] [ verbose ]
display rib nib protocol protocol [ verbose ]
Display next hop information for direct
routes. display route-direct nib [ nib-id ] [ verbose ]
Clear IPv4 route statistics. reset ip routing-table statistics protocol [ topology topo-name |
vpn-instance vpn-instance-name ] { protocol |all }
Display IPv6 routing table information. display ipv6 routing-table [ vpn-instance vpn-instance-name ]
[ verbose ]
Display information about routes to an
IPv6 destination address.
display ipv6 routing-table [ vpn-instance vpn-instance-name ]
ipv6-address [ prefix-length ][ longer-match ] [ verbose ]
Display information about routes
permitted by an IPv6 basic ACL.
display ipv6 routing-table [ vpn-instance vpn-instance-name ]
acl ipv6-acl-number [ verbose ]
Display information about routes to a
range of IPv6 destination addresses.
display ipv6 routing-table [ vpn-instance vpn-instance-name ]
ipv6-address1 to ipv6-address2 [ verbose ]
Display information about routes
permitted by an IPv6 prefix list.
display ipv6 routing-table [ vpn-instance vpn-instance-name ]
prefix-list prefix-list-name [ verbose ]
Display information about routes
installed by an IPv6 protocol.
display ipv6 routing-table [ vpn-instance vpn-instance-name ]
protocol protocol [ inactive | verbose ]
Display IPv6 route statistics. display ipv6 routing-table [ vpn-instance vpn-instance-name ]
statistics
Display brief IPv6 routing table
information.
display ipv6 routing-table [ vpn-instance vpn-instance-name ]
summary

8
Task Command
Display route attribute information in
the IPv6 RIB. display ipv6 rib attribute [ attribute-id ]
Display IPv6 RIB GR state
information. display ipv6 rib graceful-restart
Display next hop information in the
IPv6 RIB.
display ipv6 rib nib [ self-originated ] [ nib-id ] [ verbose ]
display ipv6 rib nib protocol protocol [ verbose ]
Display next hop information for IPv6
direct routes. display ipv6 route-direct nib [ nib-id ] [ verbose ]
Clear IPv6 route statistics. reset ipv6 routing-table statistics protocol [ vpn-instance
vpn-instance-name ] { protocol |all }