HPE FlexFabric 5940 SERIES User manual
HPE FlexFabric 5940 Switch Series
Layer 2—LAN Switching Configuration Guide
Part number: 5200-1018b
Software version: Release 25xx
Document version: 6W102-20170830
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Contents
Configuring Ethernet interfaces ···························································1
Ethernet interface naming conventions ···························································································1
Configuring a management Ethernet interface··················································································1
Configuring common Ethernet interface settings ···············································································1
Splitting a 40-GE interface and combining 10-GE breakout interfaces·············································2
Configuring basic settings of an Ethernet interface or subinterface·················································3
Configuring the link mode of an Ethernet interface······································································4
Configuring jumbo frame support ····························································································5
Configuring physical state change suppression on an Ethernet interface ·········································5
Enabling loopback testing on an Ethernet interface·····································································6
Configuring generic flow control on an Ethernet interface ·····························································7
Configuring PFC on an Ethernet interface·················································································7
Enabling energy saving features on an Ethernet interface ····························································8
Setting the statistics polling interval ·························································································9
Configuring storm suppression ····························································································· 10
Configuring a Layer 2 Ethernet interface ······················································································· 11
Configuring storm control on an Ethernet interface ··································································· 11
Forcibly bringing up a fiber port ···························································································· 12
Setting the MDIX mode of an Ethernet interface······································································· 14
Testing the cable connection of an Ethernet interface································································ 14
Enabling bridging on an Ethernet interface·············································································· 15
Setting the interface connection distance················································································ 15
Configuring a Layer 3 Ethernet interface or subinterface··································································· 16
Setting the MTU for an Ethernet interface or subinterface ·························································· 16
Setting the MAC address of an Ethernet interface or subinterface················································ 16
Displaying and maintaining an Ethernet interface or subinterface ······················································· 16
Configuring loopback, null, and inloopback interfaces ···························· 18
Configuring a loopback interface ································································································· 18
Configuring a null interface········································································································· 18
Configuring an inloopback interface ····························································································· 19
Displaying and maintaining loopback, null, and inloopback interfaces·················································· 19
Bulk configuring interfaces ······························································· 20
Configuration restrictions and guidelines ······················································································· 20
Configuration procedure ············································································································ 20
Displaying and maintaining bulk interface configuration···································································· 21
Configuring the MAC address table···················································· 22
Overview································································································································ 22
How a MAC address entry is created····················································································· 22
Types of MAC address entries ····························································································· 22
MAC address table configuration task list ······················································································ 23
Configuring MAC address entries ································································································ 24
Configuration guidelines ····································································································· 24
Adding or modifying a static or dynamic MAC address entry globally ············································ 24
Adding or modifying a static or dynamic MAC address entry on an interface ·································· 25
Adding or modifying a blackhole MAC address entry································································· 25
Adding or modifying a multiport unicast MAC address entry························································ 25
Disabling MAC address learning ································································································· 26
Disabling global MAC address learning ·················································································· 27
Disabling MAC address learning on interfaces ········································································· 27
Disabling MAC address learning on a VLAN············································································ 27
Setting the aging timer for dynamic MAC address entries ································································· 28
Setting the MAC learning limit····································································································· 28
Configuring the unknown frame forwarding rule after the MAC learning limit is reached ·························· 29
Assigning MAC learning priority to interfaces ················································································· 29
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Enabling MAC address synchronization ························································································ 30
Configuring MAC address move notifications and suppression ·························································· 31
Enabling ARP fast update for MAC address moves ········································································· 32
Disabling static source check······································································································ 33
Enabling conversational remote MAC learning ··············································································· 34
Enabling SNMP notifications for the MAC address table··································································· 34
Displaying and maintaining the MAC address table ········································································· 35
MAC address table configuration example····················································································· 35
Network requirements ········································································································ 35
Configuration procedure ····································································································· 36
Verifying the configuration ··································································································· 36
Configuring MAC Information···························································· 37
Enabling MAC Information ········································································································· 37
Configuring the MAC Information mode ························································································ 37
Setting the MAC change notification interval ·················································································· 38
Setting the MAC Information queue length ···················································································· 38
MAC Information configuration example························································································ 38
Network requirements ········································································································ 38
Configuration restrictions and guidelines ················································································ 38
Configuration procedure ····································································································· 39
Configuring Ethernet link aggregation ················································· 41
Basic concepts ························································································································ 41
Aggregation group, member port, and aggregate interface ························································· 41
Aggregation states of member ports in an aggregation group······················································ 41
Operational key················································································································· 42
Configuration types············································································································ 42
Link aggregation modes······································································································ 43
Aggregating links in static mode ·································································································· 43
Choosing a reference port ··································································································· 43
Setting the aggregation state of each member port ··································································· 43
Aggregating links in dynamic mode······························································································ 44
LACP······························································································································ 45
How dynamic link aggregation works ····················································································· 46
Edge aggregate interface··········································································································· 48
Load sharing modes for link aggregation groups············································································· 48
Ethernet link aggregation configuration task list ·············································································· 48
Configuring an aggregation group································································································ 49
Configuration restrictions and guidelines ················································································ 49
Configuring a Layer 2 aggregation group ················································································ 49
Configuring a Layer 3 aggregation group ················································································ 51
Configuring an aggregate interface ······························································································ 52
Configuring the description of an aggregate interface ································································ 52
Setting the MAC address for an aggregate interface ································································· 53
Specifying ignored VLANs for a Layer 2 aggregate interface······················································· 53
Setting the MTU for a Layer 3 aggregate interface···································································· 54
Setting the minimum and maximum numbers of Selected ports for an aggregation group ················· 54
Setting the expected bandwidth for an aggregate interface························································· 55
Configuring an edge aggregate interface ················································································ 55
Enabling BFD for an aggregation group·················································································· 56
Shutting down an aggregate interface ···················································································· 57
Restoring the default settings for an aggregate interface···························································· 57
Configuring load sharing for link aggregation groups ······································································· 58
Setting load sharing modes for link aggregation groups ····························································· 58
Enabling local-first load sharing for link aggregation·································································· 59
Configuring link aggregation load sharing algorithm settings ······················································· 59
Setting the global load sharing mode for MAC-in-MAC traffic ······················································ 60
Enabling link-aggregation traffic redirection ··················································································· 60
Configuration restrictions and guidelines ················································································ 61
Configuration procedure ····································································································· 61
Forwarding the traffic of specified VLANs out of a fixed member port on an aggregate link ······················ 61
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Excluding a subnet from load sharing on aggregate links·································································· 62
Displaying and maintaining Ethernet link aggregation ······································································ 63
Ethernet link aggregation configuration examples ··········································································· 64
Layer 2 static aggregation configuration example ····································································· 64
Layer 2 dynamic aggregation configuration example ································································· 66
Layer 2 aggregation load sharing configuration example···························································· 68
Layer 2 edge aggregate interface configuration example ··························································· 70
Layer 3 static aggregation configuration example ····································································· 71
Layer 3 dynamic aggregation configuration example ································································· 73
Layer 3 aggregation load sharing configuration example···························································· 74
Layer 3 edge aggregate interface configuration example ··························································· 76
Configuring port isolation ·································································78
Assigning a port to an isolation group ··························································································· 78
Displaying and maintaining port isolation······················································································· 78
Port isolation configuration example····························································································· 79
Network requirements ········································································································ 79
Configuration procedure ····································································································· 79
Verifying the configuration ··································································································· 79
Configuring spanning tree protocols ···················································81
STP ······································································································································ 81
STP protocol frames ·········································································································· 81
Basic concepts in STP········································································································ 83
Calculation process of the STP algorithm ··············································································· 84
RSTP ···································································································································· 90
RSTP protocol frames ········································································································ 90
Basic concepts in RSTP ····································································································· 91
How RSTP works ·············································································································· 91
RSTP BPDU processing ····································································································· 92
PVST ···································································································································· 92
PVST protocol frames ········································································································ 92
Basic concepts in PVST······································································································ 93
How PVST works ·············································································································· 93
MSTP···································································································································· 93
MSTP features·················································································································· 93
MSTP protocol frames········································································································ 94
MSTP basic concepts········································································································· 95
How MSTP works·············································································································· 98
MSTP implementation on devices ························································································· 99
Rapid transition mechanism································································································· 99
Protocols and standards ·········································································································· 102
Spanning tree configuration task lists ························································································· 102
STP configuration task list ································································································· 103
RSTP configuration task list······························································································· 103
PVST configuration task list ······························································································· 104
MSTP configuration task list ······························································································ 105
Setting the spanning tree mode································································································· 106
Configuring an MST region ······································································································ 106
Configuring the root bridge or a secondary root bridge ··································································· 107
Configuring the device as the root bridge of a specific spanning tree ·········································· 107
Configuring the device as a secondary root bridge of a specific spanning tree ······························ 108
Configuring the device priority··································································································· 108
Configuring the maximum hops of an MST region ········································································· 108
Configuring the network diameter of a switched network································································· 109
Setting spanning tree timers ····································································································· 109
Configuration restrictions and guidelines ·············································································· 110
Configuration procedure ··································································································· 110
Setting the timeout factor ········································································································· 111
Configuring the BPDU transmission rate ····················································································· 111
Configuring edge ports ············································································································ 112
Configuration restrictions and guidelines ·············································································· 112
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Configuration procedure ··································································································· 112
Configuring path costs of ports·································································································· 112
Specifying a standard for the device to use when it calculates the default path cost ······················· 113
Configuring path costs of ports ··························································································· 115
Configuration example······································································································ 115
Configuring the port priority ······································································································ 116
Configuring the port link type ···································································································· 116
Configuration restrictions and guidelines ·············································································· 116
Configuration procedure ··································································································· 117
Configuring the mode a port uses to recognize and send MSTP frames············································· 117
Enabling outputting port state transition information······································································· 118
Enabling the spanning tree feature ···························································································· 118
Enabling the spanning tree feature in STP/RSTP/MSTP mode·················································· 118
Enabling the spanning tree feature in PVST mode·································································· 119
Performing mCheck················································································································ 119
Configuration restrictions and guidelines ·············································································· 119
Performing mCheck globally ······························································································ 119
Performing mCheck in interface view ··················································································· 120
Disabling inconsistent PVID protection ······················································································· 120
Configuring Digest Snooping ···································································································· 120
Configuration restrictions and guidelines ·············································································· 121
Configuration procedure ··································································································· 121
Digest Snooping configuration example ··············································································· 121
Configuring No Agreement Check ····························································································· 122
Configuration prerequisites································································································ 123
Configuration procedure ··································································································· 124
No Agreement Check configuration example ········································································· 124
Configuring TC Snooping········································································································· 124
Configuration restrictions and guidelines ·············································································· 125
Configuration procedure ··································································································· 125
Configuring protection features ································································································· 126
Configuring BPDU guard··································································································· 126
Enabling root guard ········································································································· 127
Enabling loop guard ········································································································· 127
Configuring port role restriction··························································································· 128
Configuring TC-BPDU transmission restriction······································································· 128
Enabling TC-BPDU guard ································································································· 129
Enabling BPDU drop ········································································································ 129
Enabling PVST BPDU guard······························································································ 130
About dispute guard········································································································· 130
Enabling the device to log events of detecting or receiving TC BPDUs ·············································· 131
Enabling BPDU transparent transmission on a port ······································································· 131
Enabling SNMP notifications for new-root election and topology change events ·································· 132
Displaying and maintaining the spanning tree ·············································································· 132
Spanning tree configuration example ························································································· 133
MSTP configuration example ····························································································· 133
PVST configuration example······························································································ 137
Configuring loop detection······························································ 141
Overview······························································································································ 141
Loop detection mechanism································································································ 141
Loop detection interval ····································································································· 142
Loop protection actions····································································································· 142
Port status auto recovery ·································································································· 142
Loop detection configuration task list·························································································· 143
Enabling loop detection ··········································································································· 143
Enabling loop detection globally ························································································· 143
Enabling loop detection on a port························································································ 143
Setting the loop protection action······························································································· 144
Setting the global loop protection action ··············································································· 144
Setting the loop protection action on a Layer 2 Ethernet interface ·············································· 144
Setting the loop protection action on a Layer 2 aggregate interface ············································ 144
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Setting the loop detection interval ······························································································ 144
Displaying and maintaining loop detection ··················································································· 145
Loop detection configuration example ························································································ 145
Network requirements ······································································································ 145
Configuration procedure ··································································································· 145
Verifying the configuration ································································································· 146
Configuring VLANs ······································································· 148
Overview······························································································································ 148
VLAN frame encapsulation ································································································ 148
Protocols and standards ··································································································· 149
Configuring a VLAN················································································································ 149
Configuring VLAN interfaces ···································································································· 150
Configuring port-based VLANs·································································································· 151
Introduction ···················································································································· 151
Assigning an access port to a VLAN···················································································· 152
Assigning a trunk port to a VLAN ························································································ 153
Assigning a hybrid port to a VLAN······················································································· 153
Configuring MAC-based VLANs ································································································ 154
Introduction ···················································································································· 154
General configuration restrictions and guidelines···································································· 157
Configuring static MAC-based VLAN assignment ··································································· 157
Configuring dynamic MAC-based VLAN assignment ······························································· 157
Configuring server-assigned MAC-based VLAN ····································································· 159
Configuring IP subnet-based VLANs ·························································································· 159
Configuring protocol-based VLANs ···························································································· 160
Configuring a VLAN group ······································································································· 161
Displaying and maintaining VLANs ···························································································· 161
VLAN configuration examples··································································································· 162
Port-based VLAN configuration example ·············································································· 162
MAC-based VLAN configuration example ············································································· 164
IP subnet-based VLAN configuration example ······································································· 166
Protocol-based VLAN configuration example········································································· 167
Configuring super VLANs······························································· 171
Super VLAN configuration task list····························································································· 171
Creating a sub-VLAN ·············································································································· 171
Configuring a super VLAN ······································································································· 171
Configuring a super VLAN interface ··························································································· 172
Displaying and maintaining super VLANs ···················································································· 172
Super VLAN configuration example ··························································································· 173
Network requirements ······································································································ 173
Configuration procedure ··································································································· 173
Verifying the configuration ································································································· 174
Configuring the private VLAN·························································· 176
Configuration task list·············································································································· 176
Configuration restrictions and guidelines ····················································································· 177
Configuration procedure ·········································································································· 177
Displaying and maintaining the private VLAN ··············································································· 179
Private VLAN configuration examples························································································· 179
Promiscuous port configuration example ·············································································· 179
Trunk promiscuous port configuration example ······································································ 182
Trunk promiscuous and trunk secondary port configuration example ·········································· 185
Secondary VLAN Layer 3 communication configuration example··············································· 189
Configuring voice VLANs ······························································· 192
Overview······························································································································ 192
Methods of identifying IP phones······························································································· 192
Identifying IP phones through OUI addresses ········································································ 192
Automatically identifying IP phones through LLDP ·································································· 193
Advertising the voice VLAN information to IP phones····································································· 193
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IP phone access methods········································································································ 193
Connecting the host and the IP phone in series ····································································· 193
Connecting the IP phone to the device················································································· 194
Voice VLAN assignment modes ································································································ 194
Automatic mode ·············································································································· 194
Manual mode ················································································································· 195
Cooperation of voice VLAN assignment modes and IP phones ················································· 195
Security mode and normal mode of voice VLANs·········································································· 196
Voice VLAN configuration task list ····························································································· 196
Configuring the QoS priority settings for voice traffic ······································································ 197
Configuring a port to operate in automatic voice VLAN assignment mode ·········································· 198
Configuration restrictions and guidelines ·············································································· 198
Configuration procedure ··································································································· 198
Configuring a port to operate in manual voice VLAN assignment mode ············································· 199
Configuration restrictions and guidelines ·············································································· 199
Configuration procedure ··································································································· 199
Enabling LLDP for automatic IP phone discovery·········································································· 200
Configuration restrictions and guidelines ·············································································· 200
Configuration procedure ··································································································· 200
Configuring LLDP to advertise a voice VLAN ··············································································· 200
Configuring CDP to advertise a voice VLAN ················································································ 201
Displaying and maintaining voice VLANs ···················································································· 202
Voice VLAN configuration examples ·························································································· 202
Automatic voice VLAN assignment mode configuration example ··············································· 202
Manual voice VLAN assignment mode configuration example··················································· 204
Configuring MVRP········································································ 206
MRP ··································································································································· 206
MRP implementation········································································································ 206
MRP messages ·············································································································· 206
MRP timers ···················································································································· 208
MVRP registration modes ········································································································ 209
Protocols and standards ·········································································································· 209
MVRP configuration task list····································································································· 209
Configuration restrictions and guidelines ····················································································· 209
Configuration prerequisites ······································································································ 210
Enabling MVRP ····················································································································· 210
Setting an MVRP registration mode ··························································································· 210
Setting MRP timers ················································································································ 211
Enabling GVRP compatibility ···································································································· 212
Displaying and maintaining MVRP ····························································································· 212
MVRP configuration example ··································································································· 212
Network requirements ······································································································ 212
Configuration procedure ··································································································· 213
Verifying the configuration ································································································· 216
Configuring QinQ ········································································· 223
Overview······························································································································ 223
How QinQ works ············································································································· 223
QinQ implementations ······································································································ 224
Protocols and standards ··································································································· 225
Restrictions and guidelines ······································································································ 225
Enabling QinQ······················································································································· 225
Configuring transparent transmission for VLANs ··········································································· 225
Configuring the TPID for VLAN tags··························································································· 226
Configuring the TPID for CVLAN tags ·················································································· 227
Configuring the TPID for SVLAN tags ·················································································· 227
Setting the 802.1p priority in SVLAN tags···················································································· 227
Displaying and maintaining QinQ······························································································· 228
QinQ configuration examples···································································································· 229
Basic QinQ configuration example ······················································································ 229
VLAN transparent transmission configuration example ···························································· 231
vii
Configuring VLAN mapping ···························································· 233
Overview······························································································································ 233
VLAN mapping application scenarios··················································································· 233
VLAN mapping implementations ························································································· 235
VLAN mapping configuration task list ························································································· 238
Configuring one-to-one VLAN mapping······················································································· 238
Configuring many-to-one VLAN mapping ···················································································· 239
Configuring many-to-one VLAN mapping in a network with dynamic IP address assignment ··········· 239
Configuring many-to-one VLAN mapping in a network with static IP address assignment················ 242
Configuring one-to-two VLAN mapping ······················································································· 244
Configuring two-to-two VLAN mapping ······················································································· 245
Displaying and maintaining VLAN mapping ················································································· 245
VLAN mapping configuration examples ······················································································ 245
One-to-one and many-to-one VLAN mapping configuration example ·········································· 245
One-to-two and two-to-two VLAN mapping configuration example ············································· 251
Configuring LLDP········································································· 254
Overview······························································································································ 254
Basic concepts ··············································································································· 254
Working mechanism ········································································································ 259
Protocols and standards ··································································································· 260
LLDP configuration task list ······································································································ 260
Performing basic LLDP configurations ························································································ 261
Enabling LLDP················································································································ 261
Setting the LLDP bridge mode ··························································································· 261
Setting the LLDP operating mode ······················································································· 261
Setting the LLDP reinitialization delay ·················································································· 262
Enabling LLDP polling ······································································································ 262
Configuring the advertisable TLVs ······················································································ 263
Configuring the management address and its encoding format·················································· 266
Setting other LLDP parameters ·························································································· 267
Setting an encapsulation format for LLDP frames ··································································· 268
Disabling LLDP PVID inconsistency check············································································ 269
Configuring CDP compatibility ·································································································· 269
Configuration prerequisites································································································ 270
Configuration procedure ··································································································· 270
Configuring LLDP trapping and LLDP-MED trapping······································································ 270
Displaying and maintaining LLDP ······························································································ 271
LLDP configuration examples ··································································································· 272
Basic LLDP configuration example ······················································································ 272
CDP-compatible LLDP configuration example ······································································· 276
Configuring L2PT ········································································· 278
Overview······························································································································ 278
Background···················································································································· 278
L2PT operating mechanism ······························································································· 279
L2PT configuration task list ······································································································ 280
Enabling L2PT ······················································································································ 280
Restrictions and guidelines································································································ 280
Enabling L2PT for a protocol······························································································ 280
Setting the destination multicast MAC address for tunneled packets ················································· 281
Displaying and maintaining L2PT ······························································································ 281
L2PT configuration examples ··································································································· 282
Configuring L2PT for STP ································································································· 282
Configuring L2PT for LACP ······························································································· 283
Configuring cut-through forwarding ·················································· 287
Configuring service loopback groups ················································ 288
Configuration procedure ·········································································································· 288
Displaying and maintaining service loopback groups ····································································· 289
viii
Service loopback group configuration example············································································· 289
Network requirements ······································································································ 289
Configuration procedure ··································································································· 289
Document conventions and icons ···················································· 290
Conventions ························································································································· 290
Network topology icons ··········································································································· 291
Support and other resources ·························································· 292
Accessing Hewlett Packard Enterprise Support ············································································ 292
Accessing updates ················································································································· 292
Websites ······················································································································· 293
Customer self repair········································································································· 293
Remote support ·············································································································· 293
Documentation feedback ·································································································· 293
Index ························································································· 295
1
Configuring Ethernet interfaces
The Switch Series supports Ethernet interfaces, management Ethernet interfaces, Console
interfaces, and USB interfaces. For the interface types and the number of interfaces supported by a
switch model, see the installation guide.
This chapter describes how to configure management Ethernet interfaces and Ethernet interfaces.
Ethernet interface naming conventions
The Ethernet interfaces are named in the format of interface type A/B/C. The letters that follow the
interface type represent the following elements:
•A—IRF member ID. If the switch is not in an IRF fabric, A is 1 by default.
•B—Slot number. 0indicates the interface is a fixed interface of the switch.
•C—Port index.
A 10-GE breakout interface split from a 40-GE interface is named in the format of interface type
A/B/C:D. A/B/C is the interface number of the 40-GE interface and D is the number of the 10-GE
interface, which is in the range of 1 to 4. For information about splitting a 40-GE interface, see
"Splitting a 40-GE interface and combining 10-GE breakout interfaces."
Configuring a management Ethernet interface
A management interface uses an RJ-45 connector. You can connect the interface to a PC for
software loading and system debugging, or connect it to a remote NMS for remote system
management.
To configure a management Ethernet interface:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter management
Ethernet interface view.
interface
M-GigabitEthernet
interface-number
N/A
3. (Optional.) Set the
interface description. description text The default setting is
M-GigabitEthernet0/0/0 Interface.
4. (Optional.) Shut down
the interface. shutdown By default, the management Ethernet
interface is up.
Configuring common Ethernet interface settings
This section describes the settings common to Layer 2 Ethernet interfaces, Layer 3 Ethernet
interfaces, and Layer 3 Ethernet subinterfaces. For more information about the settings specific to
Layer 2 Ethernet interfaces or subinterfaces, see "Configuring a Layer 2 Ethernet interface." For
more information about the settings specific to Layer 3 Ethernet interfaces or subinterfaces, see
"Configuring a Layer 3 Ethernet interface or subinterface."
2
Splitting a 40-GE interface and combining 10-GE breakout
interfaces
Configuration restrictions and guidelines
When you split a 40-GE interface and combine 10-GE breakout interfaces, follow these restrictions
and guidelines:
•40-GE interfaces FortyGigE 1/0/1 through FortyGigE 1/0/4 and FortyGigE 1/0/29 through
FortyGigE 1/0/32 on an HPE FlexFabric 5940 32QSFP+ Switch (JH396A) switch do not support
one-to-four splitting.
•100-GE interfaces on an HPE FlexFabric 5940 48SFP+ 6QSFP28 Switch (JH390A) or HPE
FlexFabric 5940 48XGT 6QSFP28 Switch (JH391A) switch do not support one-to-four splitting.
•When an LSWM124XGT2Q (JH182A), LSWM124XG2Q (JH181A), or LSWM124XG2QL
(JH180A) interface module is installed in an HPE FlexFabric 5940 4-slot Switch (JH398A)
switch , 40-GE interfaces on these modules do not support one-to-four splitting.
•When an LSWM18QC (JH183A) interface module is installed in an HPE FlexFabric 5940 4-slot
Switch (JH398A) switch, the last two 40-GE interfaces on the module do not support one-to-four
splitting.
Splitting a 40-GE interface into four 10-GE breakout interfaces
You can use a 40-GE interface as a single interface. To improve port density, reduce costs, and
improve network flexibility, you can also split a 40-GE interface into four 10-GE breakout interfaces.
For example, you can split 40-GE interface FortyGigE 1/0/1 into four 10-GE breakout interfaces
Ten-GigabitEthernet 1/0/1:1 through Ten-GigabitEthernet 1/0/1:4.
After you configure this feature on a 40-GE interface, the system deletes the 40-GE interface and
creates the four 10-GE breakout interfaces.
After the using tengige command is successfully configured, you do not need to reboot the switch.
You can view the four 10-GE breakout interfaces by using the display interface brief command.
A 40-GE interface split into four 10-GE breakout interfaces must use a dedicated 1-to-4 cable. For
more information about the cable, see the installation guides.
To split a 40-GE interface into four 10-GE breakout interfaces:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter 40-GE interface view. interface interface-type
interface-number N/A
3. Split the 40-GE interface into
four 10-GE breakout
interfaces. using tengige
By default, a 40-GE interface is not
split and operates as a single
interface.
The 10-GE breakout interfaces
support the same configuration and
attributes as common 10-GE
interfaces, except that they are
numbered differently.
Combining four 10-GE breakout interfaces into a 40-GE interface
If you need higher bandwidth on a single interface, you can combine the four 10-GE breakout
interfaces into a 40-GE interface.
After you configure this feature on a 10-GE breakout interface, the system deletes the four 10-GE
breakout interfaces and creates the 40-GE interface.
3
After the using fortygige command is successfully configured, you do not need to reboot the switch.
You can view the 40-GE interface by using the display interface brief command.
After you combine the four 10-GE breakout interfaces, replace the dedicated 1-to-4 cable with a
dedicated 1-to-1 cable or a 40-GE transceiver module. For more information about the cable or
transceiver module, see the installation guides.
To combine four 10-GE breakout interfaces into a 40-GE interface:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter the view of any 10-GE
breakout interface. interface interface-type
interface-number N/A
3. Combine the four 10-GE
breakout interfaces into a
40-GE interface. using fortygige By default, a 10-GE breakout
interface operates as a single
interface.
Configuring basic settings of an Ethernet interface or
subinterface
You can configure an Ethernet interface to operate in one of the following duplex modes:
•Full-duplex mode—The interface can send and receive packets simultaneously.
•Half-duplex mode—The interface can only send or receive packets at a given time.
•Autonegotiation mode—The interface negotiates a duplex mode with its peer.
You can set the speed of an Ethernet interface or enable it to automatically negotiate a speed with its
peer.
Configuring an Ethernet interface
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Ethernet interface
view. interface interface-type
interface-number N/A
3. Set the description for
the Ethernet interface. description text
The default setting is interface-name
Interface. For example,
Ten-GigabitEthernet1/0/1 Interface.
4. Set the duplex mode for
the Ethernet interface. duplex { auto | full | half }
By default, the duplex mode is auto for
Ethernet interfaces.
Copper ports operating at 1000 Mbps or
10 Gbps and fiber ports do not support the
half keyword.
5. Set the speed for the
Ethernet interface.
speed { 10 | 100 | 1000 |
10000 | 40000 | 100000 |
auto }
The default setting is auto for Ethernet
interfaces.
Support for the keywords depends on the
interface type. For more information, use
the speed ? command in interface view.
6. Set the expected
bandwidth for the
Ethernet interface. bandwidth bandwidth-value By default, the expected bandwidth (in
kbps) is the interface baud rate divided by
1000.
4
Step Command Remarks
7. Restore the default
settings for the Ethernet
interface. default N/A
8. Bring up the Ethernet
interface. undo shutdown
By default, Ethernet interfaces are in up
state.
The loopback, shutdown ,and port
up-mode commands are mutually
exclusive.
Configuring an Ethernet subinterface
Step Command Remarks
1. Enter system view. system-view N/A
2. Create an Ethernet
subinterface. interface interface-type
interface-number.subnumber N/A
3. Set the description for the
Ethernet subinterface. description text
The default setting is
interface-name Interface. For
example,
Ten-GigabitEthernet1/0/1.1
Interface.
4. Restore the default settings
for the Ethernet subinterface. default N/A
5. Set the expected bandwidth
for the Ethernet subinterface. bandwidth bandwidth-value
By default, the expected
bandwidth (in kbps) is the
interface baud rate divided by
1000.
6. Bring up the Ethernet
subinterface. undo shutdown
By default, Ethernet subinterfaces
are in up state.
The shutdown and port
up-mode commands are mutually
exclusive.
Configuring the link mode of an Ethernet interface
CAUTION:
After you change the link mode of an Ethernet interface, all commands (except the shutdown
command) on the Ethernet interface are restored to their defaults in the new link mode.
The interfaces on this Switch Series can operate either as Layer 2 or Layer 3 Ethernet interfaces.
You can set the link mode to bridge or route.
To configure the link mode of an Ethernet interface:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Ethernet interface
view. interface interface-type
interface-number N/A
3. Configure the link mode of
the Ethernet interface. port link-mode { bridge | route } By default, Ethernet interfaces
operate in bridge mode.
5
Configuring jumbo frame support
An Ethernet interface might receive frames larger than the standard Ethernet frame size during
high-throughput data exchanges, such as file transfers. These frames are called jumbo frames.
The Ethernet interface processes jumbo frames in the following ways:
•When the Ethernet interface is configured to deny jumbo frames, the Ethernet interface
discards jumbo frames.
•When the Ethernet interface is configured with jumbo frame support, the Ethernet interface
performs the following operations:
{Processes jumbo frames within the specified length.
{Discards jumbo frames that exceed the specified length.
To configure jumbo frame support in interface view:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Ethernet interface
view. interface interface-type
interface-number N/A
3. Configure jumbo frame
support. jumboframe enable [ size ]
By default, the switch allows jumbo
frames within 10000 bytes to pass
through all Ethernet interfaces.
Configuring physical state change suppression on an
Ethernet interface
IMPORTANT:
Do not enable this feature on an interface that has RRPP, spanning tree protocols, or Smart Link
enabled.
The physical link state of an Ethernet interface is either up or down. Each time the physical link of an
interface comes up or goes down, the interface immediately reports the change to the CPU. The
CPU then performs the following operations:
•Notifies the upper-layer protocol modules (such as routing and forwarding modules) of the
change for guiding packet forwarding.
•Automatically generates traps and logs to inform users to take the correct actions.
To prevent frequent physical link flapping from affecting system performance, configure physical
state change suppression. You can configure this feature to suppress only link-down events, only
link-up events, or both. If an event of the specified type still exists when the suppression interval
expires, the system reports the event.
When you configure this feature, follow these guidelines:
•To suppress only link-down events, configure the link-delay [ msec ] delay-time command.
•To suppress only link-up events, configure the link-delay [ msec ] delay-time mode up
command.
•To suppress both link-down and link-up events, configure the link-delay [ msec ] delay-time
mode updown command.
To configure physical state change suppression on an Ethernet interface:
6
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Ethernet
interface view. interface interface-type
interface-number N/A
3. Configure physical
state change
suppression.
link-delay [ msec ]
delay-time [ mode { up |
updown }]
By default, the link-down or link-up event is
immediately reported to the CPU.
If you configure this command multiple times on
an Ethernet interface, the most recent
configuration takes effect.
Enabling loopback testing on an Ethernet interface
CAUTION:
After you enable this feature on an Ethernet interface, the interface cannot forward data traffic
correctly.
Perform this task to determine whether an Ethernet link works correctly.
Loopback testing includes the following types:
•Internal loopback testing—Tests the device where the Ethernet interface resides. The
Ethernet interface sends outgoing packets back to the local device. If the device fails to receive
the packets, the device fails.
•External loopback testing—Tests the inter-device link. The Ethernet interface sends incoming
packets back to the remote device. If the remote device fails to receive the packets, the
inter-device link fails.
Configuration restrictions and guidelines
•On an administratively shut down Ethernet interface (displayed as in ADM or Administratively
DOWN state), you cannot perform an internal or external loopback test.
•The speed, duplex, mdix-mode, and shutdown commands are not available during a
loopback test.
•A loopback test cannot be performed on an interface configured with the port up-mode
command.
•During a loopback test, the Ethernet interface operates in full duplex mode. When a loopback
test is complete, the port returns to its duplex setting..
Configuration procedure
To enable loopback testing on an Ethernet interface:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Ethernet interface
view. interface interface-type
interface-number N/A
3. Enable loopback testing. loopback { external | internal } By default, no loopback test is
performed.
7
Configuring generic flow control on an Ethernet interface
To avoid dropping packets on a link, you can enable generic flow control at both ends of the link.
When traffic congestion occurs at the receiving end, the receiving end sends a flow control (Pause)
frame to ask the sending end to suspend sending packets. Generic flow control includes the
following types:
•TxRx-mode generic flow control—Enabled by using the flow-control command. With
TxRx-mode generic flow control enabled, an interface can both send and receive flow control
frames:
{When congestion occurs, the interface sends a flow control frame to its peer.
{When the interface receives a flow control frame from its peer, it suspends sending packets
to its peer.
•Rx-mode generic flow control—Enabled by using the flow-control receive enable
command. With Rx-mode generic flow control enabled, an interface can receive flow control
frames, but it cannot send flow control frames:
{When congestion occurs, the interface cannot send flow control frames to its peer.
{When the interface receives a flow control frame from its peer, it suspends sending packets
to its peer.
To handle unidirectional traffic congestion on a link, configure the flow-control receive enable
command at one end and the flow-control command at the other end. To enable both ends of a link
to handle traffic congestion, configure the flow-control command at both ends.
To enable generic flow control on an Ethernet interface:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Ethernet interface
view. interface interface-type
interface-number N/A
3. Enable generic flow
control.
•Enable TxRx-mode
generic flow control:
flow-control
•Enable Rx-mode generic
flow control:
flow-control receive
enable
By default, generic flow control is
disabled on an Ethernet interface.
Configuring PFC on an Ethernet interface
When congestion occurs in the network, the local device notifies the peer to stop sending packets
carrying the specified 802.1p priority if all of the following conditions exist:
•Both the local end and the remote end have PFC enabled.
•Both the local end and the remote end have the priority-flow-control no-drop dot1p
command configured.
•The specified 802.1p priority is in the 802.1p priority list specified by the dot1p-list argument.
•The local end receives a packet carrying the specified 802.1p priority.
The state of the PFC feature is determined by the PFC configuration on the local end and on the peer
end. In Table 1:
•The first row lists the PFC configuration on the local interface.
•The first column lists the PFC configuration on the peer.
8
•The Enabled and Disabled fields in other cells are possible negotiation results.
Make sure all interfaces that a data flow passes through have the same PFC configuration.
Table 1 PFC configurations and negotiation results
Local (right)
Peer (below) enable auto Default
enable Enabled Enabled. Disabled
auto Enabled
•Enabled if negotiation
succeeds.
•Disabled if negotiation fails.
Disabled
Default Disabled Disabled. Disabled
Configuration restrictions and guidelines
When you configure PFC, follow these restrictions and guidelines:
•For IRF and other protocols to operate correctly, as a best practice, do not enable PFC for
802.1p priorities 0, 6, and 7.
•To avoid packet loss, apply the same PFC configuration to all interfaces that the packets pass
through.
•If you do not enable PFC on an interface, the interface can receive but cannot process PFC
pause frames. To make PFC take effect, you must enable PFC on both ends.
•If you configure the flow control or flow-control receive enable command on a PFC-enabled
interface, the following rules apply:
{The PFC configuration takes effect.
{The configuration of the flow control or flow-control receive enable command is ignored.
{The flow control or flow-control receive enable command takes effect on the interface
only when PFC is disabled on it.
Configuration procedure
To configure PFC on an Ethernet interface:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Ethernet interface
view. interface interface-type
interface-number N/A
3. Enable PFC in auto mode or
forcibly on the Ethernet
interface.
priority-flow-control {auto |
enable } By default, PFC is disabled.
4. Enable PFC for 802.1p
priorities. priority-flow-control no-drop
dot1p dot1p-list
By default, PFC is disabled for all
802.1p priorities.
Enabling energy saving features on an Ethernet interface
IMPORTANT:
Fiber ports do not support these features.
9
Enabling auto power-down on an Ethernet interface
When an Ethernet interface with auto power-down enabled has been down for a certain period of
time, both of the following events occur:
•The device automatically stops supplying power to the Ethernet interface.
•The Ethernet interface enters the power save mode.
The time period depends on the chip specifications and is not configurable.
When the Ethernet interface comes up, both of the following events occur:
•The device automatically restores power supply to the Ethernet interface.
•The Ethernet interface restores to its normal state.
To enable auto power-down on an Ethernet interface:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Ethernet interface
view. interface interface-type
interface-number N/A
3. Enable auto power-down on
the Ethernet interface. port auto-power-down By default, auto power-down is
disabled on an Ethernet interface.
Enabling EEE on an Ethernet interface
With Energy Efficient Ethernet (EEE) enabled, a link-up interface enters low power state if it has not
received any packet for a period of time. The time period depends on the chip specifications and is
not configurable. When a packet arrives later, the device automatically restores power supply to the
interface and the interface restores to the normal state.
To enable EEE on an Ethernet interface:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Ethernet interface
view. interface interface-type
interface-number N/A
3. Enable EEE on the
Ethernet interface. eee enable By default, EEE is disabled on
an Ethernet interface.
Setting the statistics polling interval
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Ethernet interface
view. interface interface-type
interface-number N/A
3. Set the statistics polling
interval for the Ethernet
interface. flow-interval interval By default, the statistics polling
interval is 300 seconds.
To display the interface statistics collected in the last statistics polling interval, use the display
interface command.
10
Configuring storm suppression
The storm suppression feature ensures that the size of a particular type of traffic (broadcast,
multicast, or unknown unicast traffic) does not exceed the threshold on an interface. When the
broadcast, multicast, or unknown unicast traffic on the interface exceeds this threshold, the system
discards packets until the traffic drops below this threshold.
Both storm suppression and storm control can suppress storms on an interface. Storm suppression
uses the chip to suppress traffic. Storm suppression has less impact on the device performance than
storm control, which uses software to suppress traffic.
Configuration restrictions and guidelines
When you configure storm suppression, follow these restrictions and guidelines:
•An interframe gap exists between each two continuous frames. The system excludes the time
of interframe gaps in monitoring the traffic size on the interface. The configured suppression
thresholds must be less than the total traffic that passes through the interface.
•For the traffic suppression result to be determined, do not configure storm control together with
storm suppression for the same type of traffic. For more information about storm control, see
"Configuring storm control on an Ethernet interface."
•Storm suppression configured on a Layer 3 Ethernet interface applies to the interface and its
subinterfaces if it is on a boarder gateway of the following networks:
{VXLAN IP gateway network.
{EVPN gateway network.
For more information about VXLAN IP gateway and EVPN gateway networks, see VXLAN
Configuration Guide and EVPN Configuration Guide.
•When you configure the suppression threshold in kbps, the actual suppression threshold might
be different from the configured one as follows:
{If the configured value is smaller than 64, the value of 64 takes effect.
{If the configured value is greater than 64 but not an integer multiple of 64, the integer
multiple of 64 that is greater than and closest to the configured value takes effect.
For the suppression threshold that takes effect, see the prompt on the device.
Configuration procedure
To set storm suppression thresholds on an Ethernet interface:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Ethernet interface
view. interface interface-type
interface-number N/A
3. Enable broadcast
suppression and set the
broadcast suppression
threshold.
broadcast-suppression { ratio |
pps max-pps | kbps max-kbps }
By default, broadcast suppression
is disabled.
4. Enable multicast
suppression and set the
multicast suppression
threshold.
multicast-suppression { ratio |
pps max-pps | kbps max-kbps }
[ unknown ]
By default, multicast suppression
is disabled.
5. Enable unknown unicast
suppression and set the
unknown unicast
suppression threshold.
unicast-suppression { ratio |pps
max-pps | kbps max-kbps }
By default, unknown unicast
suppression is disabled.
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