HPE 5920 series Installation manual

HPE 5920 & 5900 Switch Series
Layer 3—IP Services
Command Reference
Part number:
5998-6643s
Software version: Release 24
22P01
Document version: 6W101-20170622

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Contents
ARP commands···············································································1
arp check enable···················································································································1
arp check log enable··············································································································1
arp max-learning-num············································································································2
arp max-learning-number········································································································3
arp multiport·························································································································4
arp static······························································································································5
arp timer aging······················································································································6
display arp ···························································································································6
display arp ip-address············································································································8
display arp entry-limit·············································································································9
display arp timer aging ···········································································································9
display arp vpn-instance······································································································· 10
reset arp···························································································································· 11
Gratuitous ARP commands ······························································12
arp ip-conflict log prompt······································································································· 12
arp send-gratuitous-arp ········································································································ 12
gratuitous-arp-learning enable ······························································································· 13
gratuitous-arp-sending enable ······························································································· 14
Proxy ARP commands ····································································15
display local-proxy-arp ········································································································· 15
display proxy-arp················································································································· 15
local-proxy-arp enable·········································································································· 16
proxy-arp enable················································································································· 17
ARP snooping commands································································18
arp snooping enable ············································································································ 18
display arp snooping············································································································ 18
reset arp snooping··············································································································· 19
ARP fast-reply commands································································21
arp fast-reply enable ············································································································ 21
IP addressing commands·································································22
display ip interface··············································································································· 22
display ip interface brief········································································································ 24
ip address·························································································································· 25
ip address unnumbered········································································································ 27
DHCP commands ··········································································28
Common DHCP commands········································································································· 28
dhcp dscp·························································································································· 28
dhcp enable ······················································································································· 28
dhcp select ························································································································ 29
DHCP server commands············································································································· 30
address range ···················································································································· 30
bims-server························································································································ 31
bootfile-name ····················································································································· 31
class································································································································· 32
dhcp class·························································································································· 33
dhcp server always-broadcast ······························································································· 34
dhcp server apply ip-pool······································································································ 35
dhcp server bootp ignore ······································································································ 35
dhcp server bootp reply-rfc-1048···························································································· 36
dhcp server forbidden-ip······································································································· 36

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dhcp server ip-pool·············································································································· 37
dhcp server ping packets······································································································ 38
dhcp server ping timeout······································································································· 39
dhcp server relay information enable······················································································· 39
display dhcp server conflict ··································································································· 40
display dhcp server expired··································································································· 41
display dhcp server free-ip ···································································································· 42
display dhcp server ip-in-use·································································································43
display dhcp server pool······································································································· 44
display dhcp server statistics································································································· 46
dns-list ······························································································································ 48
domain-name ····················································································································· 48
expired······························································································································ 49
forbidden-ip························································································································ 50
gateway-list························································································································ 50
if-match····························································································································· 51
nbns-list····························································································································· 53
netbios-type ······················································································································· 53
network ····························································································································· 54
next-server························································································································· 55
option································································································································ 56
reset dhcp server conflict······································································································ 57
reset dhcp server expired······································································································ 58
reset dhcp server ip-in-use···································································································· 58
reset dhcp server statistics···································································································· 59
static-bind·························································································································· 59
tftp-server domain-name······································································································· 60
tftp-server ip-address ··········································································································· 61
voice-config························································································································ 61
DHCP relay agent commands ······································································································ 62
dhcp relay check mac-address······························································································· 62
dhcp relay check mac-address aging time················································································ 63
dhcp relay client-information record ························································································ 64
dhcp relay client-information refresh························································································ 64
dhcp relay client-information refresh enable··············································································65
dhcp relay information circuit-id······························································································ 66
dhcp relay information enable································································································ 68
dhcp relay information remote-id ···························································································· 68
dhcp relay information strategy ······························································································ 69
dhcp relay release ip············································································································ 70
dhcp relay server-address····································································································· 71
display dhcp relay check mac-address ···················································································· 71
display dhcp relay client-information ······················································································· 72
display dhcp relay information································································································ 73
display dhcp relay server-address ·························································································· 74
display dhcp relay statistics··································································································· 75
reset dhcp relay client-information ·························································································· 76
reset dhcp relay statistics······································································································ 77
DHCP client commands ·············································································································· 77
dhcp client dad enable ········································································································· 77
dhcp client dscp·················································································································· 78
dhcp client identifier············································································································· 78
display dhcp client··············································································································· 79
ip address dhcp-alloc··········································································································· 81
DHCP snooping commands········································································································· 82
dhcp snooping binding database filename················································································ 82
dhcp snooping binding database update interval ······································································· 84
dhcp snooping binding database update now ···········································································84
dhcp snooping binding record································································································ 85
dhcp snooping check mac-address························································································· 85
dhcp snooping check request-message··················································································· 86
dhcp snooping deny············································································································· 87

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dhcp snooping enable·········································································································· 87
dhcp snooping information circuit-id························································································ 88
dhcp snooping information enable ·························································································· 90
dhcp snooping information remote-id ······················································································ 90
dhcp snooping information strategy························································································· 91
dhcp snooping log enable ····································································································· 92
dhcp snooping max-learning-num··························································································· 93
dhcp snooping rate-limit········································································································ 93
dhcp snooping trust ············································································································· 94
display dhcp snooping binding······························································································· 95
display dhcp snooping binding database·················································································· 96
display dhcp snooping information·························································································· 96
display dhcp snooping packet statistics ··················································································· 98
display dhcp snooping trust··································································································· 98
reset dhcp snooping binding·································································································· 99
reset dhcp snooping packet statistics······················································································ 99
BOOTP client commands ·········································································································· 100
display bootp client············································································································ 100
ip address bootp-alloc········································································································ 101
DNS commands··········································································· 102
display dns domain············································································································ 102
display dns host················································································································ 102
display dns server ············································································································· 104
display ipv6 dns server······································································································· 105
dns domain ······················································································································ 105
dns dscp·························································································································· 106
dns proxy enable··············································································································· 107
dns server························································································································ 107
dns source-interface ·········································································································· 108
dns spoofing····················································································································· 109
dns trust-interface·············································································································· 110
ip host····························································································································· 111
ipv6 dns dscp ··················································································································· 111
ipv6 dns server ················································································································· 112
ipv6 dns spoofing ·············································································································· 113
ipv6 host·························································································································· 114
reset dns host··················································································································· 115
DDNS commands ········································································ 116
ddns apply policy··············································································································· 116
ddns dscp························································································································ 117
ddns policy······················································································································· 117
display ddns policy ············································································································ 118
interval···························································································································· 119
method···························································································································· 120
password························································································································· 121
ssl-client-policy ················································································································· 122
url··································································································································· 123
username ························································································································ 125
Basic IP forwarding commands ······················································· 126
display fib ························································································································ 126
ip forwarding-table save······································································································ 128
Load sharing commands································································ 129
display ip load-sharing path································································································· 129
ip load-sharing local-first enable··························································································· 130
ip load-sharing mode per-flow······························································································ 131
ip load-sharing symmetric enable ························································································· 132

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Fast forwarding commands ···························································· 133
display ip fast-forwarding aging-time ····················································································· 133
display ip fast-forwarding cache ··························································································· 133
display ip fast-forwarding fragcache······················································································ 134
ip fast-forwarding aging-time ······························································································· 135
ip fast-forwarding load-sharing····························································································· 136
reset ip fast-forwarding cache······························································································ 136
IRDP commands·········································································· 138
ip irdp······························································································································ 138
ip irdp address·················································································································· 138
ip irdp lifetime··················································································································· 139
ip irdp interval··················································································································· 140
ip irdp multicast················································································································· 140
ip irdp preference ·············································································································· 141
IP performance optimization commands············································ 143
display icmp statistics········································································································· 143
display ip statistics············································································································· 144
display rawip ···················································································································· 145
display rawip verbose········································································································· 146
display tcp························································································································ 148
display tcp statistics··········································································································· 149
display tcp verbose············································································································ 151
display udp ······················································································································ 153
display udp statistics·········································································································· 154
display udp verbose··········································································································· 155
ip forward-broadcast·········································································································· 157
ip icmp error-interval ·········································································································· 158
ip icmp fragment discarding································································································· 159
ip icmp source ·················································································································· 159
ip mtu······························································································································ 160
ip redirects enable············································································································· 161
ip ttl-expires enable ··········································································································· 161
ip unreachables enable ······································································································ 162
reset ip statistics ··············································································································· 163
reset tcp statistics·············································································································· 163
reset udp statistics············································································································· 163
tcp mss ··························································································································· 164
tcp path-mtu-discovery······································································································· 165
tcp syn-cookie enable ········································································································ 165
tcp timer fin-timeout ··········································································································· 166
tcp timer syn-timeout·········································································································· 167
tcp window······················································································································· 167
UDP helper commands ································································· 169
display udp-helper interface ································································································ 169
reset udp-helper statistics ··································································································· 170
udp-helper broadcast-map ·································································································· 170
udp-helper enable ············································································································· 171
udp-helper port ················································································································· 171
udp-helper server·············································································································· 172
IPv6 basics commands·································································· 174
display ipv6 fib·················································································································· 174
display ipv6 icmp statistics·································································································· 175
display ipv6 interface ········································································································· 176
display ipv6 interface prefix ································································································· 180
display ipv6 neighbors········································································································ 181
display ipv6 neighbors count ······························································································· 183
display ipv6 neighbors entry-limit·························································································· 183

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display ipv6 neighbors vpn-instance······················································································ 184
display ipv6 pathmtu ·········································································································· 185
display ipv6 prefix·············································································································· 186
display ipv6 rawip·············································································································· 187
display ipv6 rawip verbose ·································································································· 188
display ipv6 statistics ········································································································· 190
display ipv6 tcp················································································································· 192
display ipv6 tcp verbose ····································································································· 193
display ipv6 udp················································································································ 196
display ipv6 udp verbose ···································································································· 197
ipv6 address····················································································································· 199
ipv6 address anycast ········································································································· 200
ipv6 address auto·············································································································· 201
ipv6 address auto link-local································································································· 201
ipv6 address eui-64 ··········································································································· 202
ipv6 address link-local········································································································ 203
ipv6 hop-limit···················································································································· 204
ipv6 hoplimit-expires enable································································································ 205
ipv6 icmpv6 error-interval···································································································· 205
ipv6 icmpv6 multicast-echo-reply enable················································································ 206
ipv6 icmpv6 source············································································································ 207
ipv6 mtu ·························································································································· 207
ipv6 nd autoconfig managed-address-flag·············································································· 208
ipv6 nd autoconfig other-flag ······························································································· 209
ipv6 nd dad attempts·········································································································· 209
ipv6 nd ns retrans-timer······································································································ 210
ipv6 nd nud reachable-time ································································································· 211
ipv6 nd ra halt··················································································································· 212
ipv6 nd ra hop-limit unspecified···························································································· 212
ipv6 nd ra interval·············································································································· 213
ipv6 nd ra no-advlinkmtu····································································································· 213
ipv6 nd ra prefix ················································································································ 214
ipv6 nd ra router-lifetime····································································································· 215
ipv6 nd router-preference···································································································· 216
ipv6 neighbor···················································································································· 216
ipv6 neighbor link-local minimize·························································································· 218
ipv6 neighbor stale-aging···································································································· 218
ipv6 neighbors max-learning-num························································································· 219
ipv6 option drop enable ······································································································ 220
ipv6 pathmtu ···················································································································· 220
ipv6 pathmtu age··············································································································· 221
ipv6 prefer temporary-address····························································································· 222
ipv6 prefix························································································································ 222
ipv6 redirects enable·········································································································· 223
ipv6 temporary-address······································································································ 224
ipv6 unreachables enable ··································································································· 225
local-proxy-nd enable········································································································· 225
proxy-nd enable················································································································ 226
reset ipv6 neighbors ·········································································································· 226
reset ipv6 pathmtu············································································································· 227
reset ipv6 statistics ············································································································ 228
DHCPv6 commands ····································································· 229
Common DHCPv6 commands···································································································· 229
display ipv6 dhcp duid········································································································ 229
ipv6 dhcp dscp·················································································································· 229
ipv6 dhcp select················································································································ 230
DHCPv6 server commands········································································································ 231
address range ·················································································································· 231
display ipv6 dhcp pool········································································································ 232
display ipv6 dhcp prefix-pool ······························································································· 233
display ipv6 dhcp server ····································································································· 234

vi
display ipv6 dhcp server conflict··························································································· 235
display ipv6 dhcp server expired ·························································································· 236
display ipv6 dhcp server ip-in-use························································································· 237
display ipv6 dhcp server pd-in-use························································································ 239
display ipv6 dhcp server statistics························································································· 241
dns-server························································································································ 242
domain-name ··················································································································· 243
ipv6 dhcp pool ·················································································································· 243
ipv6 dhcp prefix-pool·········································································································· 244
ipv6 dhcp server················································································································ 245
ipv6 dhcp server apply pool································································································· 246
ipv6 dhcp server forbidden-address ······················································································ 247
ipv6 dhcp server forbidden-prefix·························································································· 248
network ··························································································································· 249
option······························································································································ 250
prefix-pool························································································································ 251
reset ipv6 dhcp server conflict······························································································ 252
reset ipv6 dhcp server expired····························································································· 252
reset ipv6 dhcp server ip-in-use ··························································································· 253
reset ipv6 dhcp server pd-in-use ·························································································· 253
reset ipv6 dhcp server statistics ··························································································· 254
sip-server························································································································· 254
static-bind························································································································ 255
temporary address range···································································································· 256
DHCPv6 relay agent commands ································································································· 257
display ipv6 dhcp relay server-address·················································································· 257
display ipv6 dhcp relay statistics··························································································· 258
ipv6 dhcp relay server-address ···························································································· 260
reset ipv6 dhcp relay statistics ····························································································· 261
DHCPv6 client commands········································································································· 262
display ipv6 dhcp client······································································································· 262
display ipv6 dhcp client statistics·························································································· 264
ipv6 address dhcp-alloc······································································································ 265
ipv6 dhcp client duid ·········································································································· 266
ipv6 dhcp client dscp·········································································································· 266
ipv6 dhcp client pd············································································································· 267
ipv6 dhcp client stateless enable·························································································· 268
reset ipv6 dhcp client statistics····························································································· 268
DHCPv6 snooping commands···································································································· 269
display ipv6 dhcp snooping binding······················································································· 269
display ipv6 dhcp snooping binding database ········································································· 270
display ipv6 dhcp snooping packet statistics··········································································· 271
display ipv6 dhcp snooping trust··························································································· 271
ipv6 dhcp snooping binding database filename ······································································· 272
ipv6 dhcp snooping binding database update interval······························································· 273
ipv6 dhcp snooping binding database update now··································································· 274
ipv6 dhcp snooping binding record························································································ 274
ipv6 dhcp snooping check request-message ·········································································· 275
ipv6 dhcp snooping deny ···································································································· 276
ipv6 dhcp snooping enable·································································································· 276
ipv6 dhcp snooping log enable····························································································· 277
ipv6 dhcp snooping max-learning-num ·················································································· 277
ipv6 dhcp snooping option interface-id enable········································································· 278
ipv6 dhcp snooping option interface-id string ·········································································· 279
ipv6 dhcp snooping option remote-id enable··········································································· 279
ipv6 dhcp snooping option remote-id string············································································· 280
ipv6 dhcp snooping rate-limit······························································································· 281
ipv6 dhcp snooping trust····································································································· 282
reset ipv6 dhcp snooping binding ························································································· 282
reset ipv6 dhcp snooping packet statistics·············································································· 283

vii
IPv6 fast forwarding commands······················································· 284
display ipv6 fast-forwarding aging-time·················································································· 284
display ipv6 fast-forwarding cache························································································ 284
ipv6 fast-forwarding aging-time ···························································································· 286
ipv6 fast-forwarding load-sharing·························································································· 286
reset ipv6 fast-forwarding cache··························································································· 287
Tunneling commands···································································· 288
bandwidth························································································································ 288
default····························································································································· 288
description ······················································································································· 289
destination ······················································································································· 289
display interface tunnel······································································································· 290
interface tunnel················································································································· 294
mtu································································································································· 295
reset counters interface······································································································ 295
service ···························································································································· 296
shutdown························································································································· 296
source····························································································································· 297
tunnel dfbit enable············································································································· 298
tunnel discard ipv4-compatible-packet··················································································· 299
tunnel tos························································································································· 299
tunnel ttl ·························································································································· 300
GRE commands ·········································································· 301
keepalive························································································································· 301
Document conventions and icons ···················································· 302
Conventions···························································································································· 302
Network topology icons ············································································································· 303
Support and other resources··························································· 304
Accessing Hewlett Packard Enterprise Support·············································································· 304
Accessing updates··················································································································· 304
Websites ························································································································· 305
Customer self repair ·········································································································· 305
Remote support ················································································································ 305
Documentation feedback ···································································································· 305
Index························································································· 307

1
ARP commands
arp check enable
Use arp check enable to enable dynamic ARP entry check.
Use undo arp check enable to disable dynamic ARP entry check.
Syntax
arp check enable
undo arp check enable
Default
Dynamic ARP entry check is enabled.
Views
System view
Predefined user roles
network-admin
Usage guidelines
Dynamic ARP entry check disables a device from supporting dynamic ARP entries with multicast
MAC addresses. The device cannot learn dynamic ARP entries containing multicast MAC
addresses. You cannot manually add static ARP entries that contain multicast MAC addresses.
When this function is disabled, ARP entries containing multicast MAC addresses are supported. The
device can learn dynamic ARP entries containing multicast MAC addresses obtained from the ARP
packets sourced from a unicast MAC address. You can also manually add static ARP entries
containing multicast MAC addresses.
Examples
# Enable dynamic ARP entry check.
<Sysname> system-view
[Sysname] arp check enable
arp check log enable
Use arp check log enable to enable the ARP logging function.
Use undo arp check log enable to disable the ARP logging function.
Syntax
arp check log enable
undo arp check log enable
Default
ARP logging is disabled.
Views
System view
Predefined user roles
network-admin

2
Usage guidelines
This function enables a device to log ARP events when ARP cannot resolve IP addresses correctly.
The device can log the following ARP events:
•
On a proxy ARP-disabled interface, the target IP address of a received ARP packet is not one of
the following IP addresses:
The IP address of the receiving interface.
The virtual IP address of the VRRP group.
The public address after NAT.
•
The sender IP address of a received ARP reply conflicts with one of the following IP addresses:
The IP address of the receiving interface.
The virtual IP address of the VRRP group.
The public address after NAT.
The device sends ARP log messages to the information center. You can use the info-center source
command to specify the log output rules for the information center. For more information about
information center, see Network Management and Monitoring Configuration Guide.
The device can generate a large amount of ARP logs. To conserve system resources, enable ARP
logging only when you are troubleshooting or debugging ARP events.
Examples
# Enable ARP logging.
<Sysname> system-view
[Sysname] arp check log enable
arp max-learning-num
Use arp max-learning-num to set the maximum number of dynamic ARP entries that an interface
can learn.
Use undo arp max-learning-num to restore the default.
Syntax
arp max-learning-num number
undo arp max-learning-num
Default
An interface can learn a maximum of 16384 dynamic ARP entries.
Views
Layer 2 Ethernet interface view, Layer 3 Ethernet interface view, Layer 3 Ethernet subinterface view,
VLAN interface view, Layer 2 aggregate interface view, Layer 3 aggregate interface view, Layer 3
aggregate subinterface view, S-channel interface view, S-channel aggregate interface view
Predefined user roles
network-admin
Parameters
number: Specifies the maximum number of dynamic ARP entries for an interface. The value range is
0 to 16384.

3
Usage guidelines
An interface can dynamically learn ARP entries. To prevent an interface from holding too many ARP
entries, you can set the maximum number of dynamic ARP entries that the interface can learn. When
the maximum number is reached, the interface stops learning ARP entries.
When the number argument is set to 0, the interface is disabled from learning dynamic ARP entries.
Examples
# Specify VLAN-interface 40 to learn a maximum of 500 dynamic ARP entries.
<Sysname> system-view
[Sysname] interface vlan-interface 40
[Sysname-Vlan-interface40] arp max-learning-num 500
# Specify Ten-GigabitEthernet 1/0/1 to learn a maximum of 1000 dynamic ARP entries.
<Sysname> system-view
[Sysname] interface Ten-GigabitEthernet 1/0/1
[Sysname-Ten-GigabitEthernet1/0/1] arp max-learning-num 1000
# Specify Layer 2 aggregate interface bridge-aggregation 1 to learn a maximum of 1000 dynamic
ARP entries.
<Sysname> system-view
[Sysname] interface bridge-aggregation 1
[Sysname-Bridge-Aggregation1] arp max-learning-num 1000
# Specify Layer 3 aggregate interface route-aggregation 1 to learn a maximum of1000 dynamic ARP
entries.
<Sysname> system-view
[Sysname] interface route-aggregation 1
[Sysname-Route-Aggregation1] arp max-learning-num 1000
arp max-learning-number
Use arp max-learning-number to set the maximum number of dynamic ARP entries that a device
can learn.
Use undo arp max-learning-number to restore the default.
Syntax
arp max-learning-number number slot slot-number
undo arp max-learning-number slot slot-number
Default
A device can learn a maximum of 16384 dynamic ARP entries.
Views
System view
Predefined user roles
network-admin
Parameters
number: Specifies the maximum number of dynamic ARP entries for a device. The value range is 0
to 16384.
slot slot-number: Specifies an IRF member device by its member ID or a PEX by its virtual slot
number.

4
Usage guidelines
Adevice can dynamically learn ARP entries. To prevent a device from holding too many ARP entries,
you can set the maximum number of dynamic ARP entries that the device can learn. When the
maximum number is reached, the device stops learning ARP entries.
When the number argument is set to 0, the device is disabled from learning dynamic ARP entries.
Examples
# Set the IRF member device in slot 1 to learn a maximum of 64 dynamic ARP entries.
<Sysname> system-view
[Sysname] arp max-learning-number 64 slot 1
arp multiport
Use arp multiport to configure a multiport ARP entry.
Use undo arp to remove an ARP entry.
Syntax
arp multiport ip-address mac-address vlan-id [ vpn-instance vpn-instance-name ]
undo arp ip-address [ vpn-instance-name ]
Default
No multiport ARP entries are configured.
Views
System view
Predefined user roles
network-admin
Parameters
ip-address: Specifies an IP address for the multiport ARP entry.
mac-address: Specifies a MAC address for the multiport ARP entry, in the format of H-H-H.
vlan-id: Specifies a VLAN for the multiport ARP entry, in the range of 1 to 4094.
vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance for the multiport ARP entry.
The vpn-instance-name argument is a case-sensitive string of 1 to 31 characters. The specified VPN
instance must already exist. Without this option, the multiport ARP entry belongs to the public
network.
Usage guidelines
The specified VLAN must already exist. If the VLAN or the corresponding VLAN interface is
removed, the multiport ARP entry is also removed.
The specified IP address must reside on the same subnet as the VLAN interface of the specified
VLAN. Otherwise, the multiport ARP entry does not take effect.
To use the multiport ARP entry, you must configure a multicast or multiport unicast MAC address
entry to specify multiple output interfaces. The MAC address entry must have the same MAC
address and VLAN ID as the multiport ARP entry.
Examples
# Configure a multiport ARP entry that comprises IP address 202.38.10.2 and MAC address
00e0-fc01-0000 in VLAN 10.
<Sysname> system-view
[Sysname] arp multiport 202.38.10.2 00e0-fc01-0000 10

5
Related commands
display arp multiport
reset arp multiport
arp static
Use arp static to configure a static ARP entry.
Use undo arp to remove an ARP entry.
Syntax
arp static ip-address mac-address [ vlan-id interface-type interface-number ][ vpn-instance
vpn-instance-name ]
undo arp ip-address [ vpn-instance-name ]
Default
No static ARP entries are configured.
Views
System view
Predefined user roles
network-admin
Parameters
ip-address: Specifies an IP address for the static ARP entry.
mac-address: Specifies a MAC address for the static ARP entry, in the format of H-H-H.
vlan-id: Specifies the ID of a VLAN to which the static ARP entry belongs. The value range is 1 to
4094. The VLAN and VLAN interface must already exist.
interface-type interface-number: Specifies an interface by its type and number. Make sure the
interface belongs to the specified VLAN.
vpn-instance vpn-instance-name: Specifies an MPLS L3VPN for the static ARP entry. The
vpn-instance-name argument is a case-sensitive string of 1 to 31 characters. The VPN instance
must already exist. To specify a static ARP entry on the public network, do not specify this option.
Usage guidelines
A static ARP entry is manually configured and maintained. It does not age out and cannot be
overwritten by any dynamic ARP entry.
Static ARP entries can be classified into long and short static ARP entries. A short static ARP entry
contains an IP-to-MAC mapping. A long static ARP entry contains an IP-to-MAC mapping, a VLAN,
and an output interface.
A static ARP entry is effective when the device works correctly.
When the VLAN or VLAN interface is deleted, long static ARP entries in the VLAN are deleted, and
resolved short static ARP entries in the VLAN become unresolved.
A resolved short static ARP entry becomes unresolved upon certain events, for example, when the
output interface goes down.
A long static ARP entry is ineffective when the corresponding VLAN interface or output interface is
down. An ineffective long static ARP entry cannot be used to forward packets.
If you specify both the vlan-id and ip-address arguments, the IP address of the corresponding VLAN
interface must be on the same network as the specified IP address.

6
If you do not specify a VPN, the undo arp command removes ARP entries only for the public
network.
Examples
# Configure a static ARP entry that comprises IP address 202.38.10.2, MAC address
00e0-fc01-0000, and output interface Ten-GigabitEthernet 1/0/1 in VLAN 10.
<Sysname> system-view
[Sysname] arp static 202.38.10.2 00e0-fc01-0000 10 Ten-GigabitEthernet 1/0/1
Related commands
display arp
reset arp
arp timer aging
Use arp timer aging to set the aging timer for dynamic ARP entries.
Use undo arp timer aging to restore the default.
Syntax
arp timer aging aging-time
undo arp timer aging
Default
The aging timer for dynamic ARP entries is 20 minutes.
Views
System view
Predefined user roles
network-admin
Parameters
aging-time: Sets the aging timer for dynamic ARP entries, in the range of 1 to 1440 minutes.
Usage guidelines
Each dynamic ARP entry in the ARP table has a limited lifetime, called an aging timer. The aging
timer of a dynamic ARP entry is reset each time the dynamic ARP entry is updated. Dynamic ARP
entries that are not updated before their aging timers expire are deleted from the ARP table.
Set the aging timer for dynamic ARP entries as needed. For example, when you configure proxy
ARP, set a short aging time so that invalid dynamic ARP entries can be deleted in time.
Examples
# Set the aging timer for dynamic ARP entries to 10 minutes.
<Sysname> system-view
[Sysname] arp timer aging 10
Related commands
display arp timer aging
display arp
Use display arp to display ARP entries.

7
Syntax
display arp [ [ all | dynamic | multiport | static ] [ slot slot-number ] | vlan vlan-id | interface
interface-type interface-number ] [ count | verbose ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
all: Displays all ARP entries.
dynamic: Displays dynamic ARP entries.
multiport: Displays multiport ARP entries.
static: Displays static ARP entries.
slot slot-number: Specifies an IRF member device by its member ID or a PEX by its virtual slot
number.
vlan vlan-id: Displays the ARP entries for the specified VLAN. The VLAN ID is in the range of 1 to
4094.
interface interface-type interface-number:Displays the ARP entries for the interface specified by the
argument interface-type interface-number.
count: Displays the number of ARP entries.
verbose: Displays detailed information about ARP entries.
Usage guidelines
This command displays information about ARP entries, including the IP address, MAC address,
VLAN ID, output interface, entry type, and aging timer.
If you do not specify any parameters, the command displays all ARP entries.
Examples
# Display all ARP entries.
<Sysname> display arp all
Type: S-Static D-Dynamic O-Openflow M-Multiport I-Invalid
IP Address MAC Address VLAN Interface Aging Type
20.1.1.1 00e0-fc00-0001 N/A N/A N/A S
193.1.1.70 00e0-fe50-6503 100 XGE1/0/1 N/A IS
192.168.0.115 000d-88f7-9f7d 1 XGE1/0/2 18 D
192.168.0.39 0012-a990-2241 1 XGE1/0/3 20 D
22.1.1.1 000c-299d-c041 10 N/A N/A M
# Display detailed information about all ARP entries.
<Sysname> display arp all verbose
Type: S-Static D-Dynamic O-Openflow M-Multiport I-Invalid
IP Address MAC Address VLAN Interface Aging Type
Vpn Instance
20.1.1.1 00e0-fc00-0001 N/A N/A N/A S
[No Vrf]
193.1.1.70 00e0-fe50-6503 100 XGE1/0/1 N/A IS
[No Vrf]

8
192.168.0.115 000d-88f7-9f7d 1 XGE1/0/2 18 D
[No Vrf]
192.168.0.39 0012-a990-2241 1 XGE1/0/3 20 D
[No Vrf]
22.1.1.1 000c-299d-c041 10 N/A N/A M
[No Vrf]
# Display the number of all ARP entries.
<Sysname> display arp all count
Total number of entries : 5
Table 1 Command output
Field
Description
IP Address IP address in an ARP entry.
MAC Address MAC address in an ARP entry.
VLAN
ID of the VLAN to which the ARP entry belongs. This field displays N/A in
either of the following situations:
•The ARP entry is an unresolved short static ARP entry.
•The output interface of theARP entry does not belong to the VLAN.
Interface
Output interface in an ARP entry. This field displays N/A in either of the
following situations:
•The ARP entry is an unresolved short static ARP entry.
•The ARP entry is a multiport ARP entry and has no output interface
information.
To obtain the output interface information of the multiportARP entry, look
up the MAC address table according to the MAC address in theARP
entry.
Aging Aging time for a dynamic ARP entry in minutes. N/A means unknown aging
time or no aging time.
Type
ARP entry type:
•D—Dynamic.
•S—Static.
•O—OpenFlow.
•M—Multiport.
•I—Invalid.
Vpn Instance Name of VPN instance. [No Vrf] is displayed if no VPN instance is configured
for the ARP entry.
Total number of entries Number of ARP entries.
Related commands
arp static
reset arp
display arp ip-address
Use display arp ip-address to display the ARP entry for an IP address.
Syntax
display arp ip-address [ slot slot-number ] [ verbose ]

9
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
ip-address: Displays the ARP entry for the specified IP address.
slot slot-number: Specifies an IRF member device by its member ID or a PEX by its virtual slot
number.
verbose: Displays the detailed information about the specified ARP entry.
Usage guidelines
The ARP entry information includes the IP address, MAC address, VLAN ID, output interface, entry
type, and aging timer.
Examples
# Display the ARP entry for the IP address 20.1.1.1.
<Sysname> display arp 20.1.1.1
Type: S-Static D-Dynamic O-Openflow M-Multiport I-Invalid
IP address MAC address VLAN Interface Aging Type
20.1.1.1 00e0-fc00-0001 N/A N/A N/A S
Related commands
arp static
reset arp
display arp entry-limit
Use display arp entry-limit to display the maximum number of ARP entries that a device supports.
Syntax
display arp entry-limit
Views
Any view
Predefined user roles
network-admin
network-operator
Examples
# Display the maximum number of ARP entries that the device supports.
<Sysname> display arp entry-limit
ARP entries: 16384
display arp timer aging
Use display arp timer aging to display the aging timer of dynamic ARP entries.

10
Syntax
display arp timer aging
Views
Any view
Predefined user roles
network-admin
network-operator
Examples
# Display the aging timer of dynamic ARP entries.
<Sysname> display arp timer aging
Current ARP aging time is 10 minute(s)
Related commands
arp timer aging
display arp vpn-instance
Use display arp vpn-instance to display the ARP entries for a VPN instance.
Syntax
display arp vpn-instance vpn-instance-name [ count ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to
31 characters.
count: Displays the number of ARP entries.
Usage guidelines
This command displays information about ARP entries for a VPN instance, including the IP address,
MAC address, VLAN ID, output interface, entry type, and aging timer.
Examples
# Display ARP entries for the VPN instance named test.
<Sysname> display arp vpn-instance test
Type: S-Static D-Dynamic O-Openflow M-Multiport I-Invalid
IP address MAC address VLAN ID Interface Aging Type
20.1.1.1 00e0-fc00-0001 N/A N/A N/A S
Related commands
arp static
reset arp

11
reset arp
Use reset arp to clear ARP entries from the ARP table.
Syntax
reset arp { all | dynamic | interface interface-type interface-number | multiport | slot slot-number |
static }
Views
User view
Predefined user roles
network-admin
Parameters
all:Clears all ARP entries.
dynamic: Clears all dynamic ARP entries.
multiport: Clears all multiport ARP entries.
static: Clears all static ARP entries.
slot slot-number: Specifies an IRF member device by its member ID or a PEX by its virtual slot
number.
interface interface-type interface-number:Clears the ARP entries for the interface specified by the
argument interface-type interface-number.
Usage guidelines
This command can separately clear static ARP entries, dynamic ARP entries, multiport ARP entries,
or ARP entries on specified interfaces.
When the interface interface-type interface-number option is specified, this command clears only
dynamic ARP entries for the specified interface.
When the slot slot-number option is specified, this command clears only dynamic ARP entries for
the specified IRF member device or PEX.
Examples
# Clear all static ARP entries.
<Sysname> reset arp static
Related commands
arp static
display arp