1.1.1.0/24 Direct 0 0 D 1.1.1.1 Vlanif10
1.1.1.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0
2.2.2.0/24 ISIS-L2 15 20 D 1.1.1.2 Vlanif10
3.3.3.0/24 Direct 0 0 D 3.3.3.1 Vlanif20
3.3.3.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0
127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0
127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0
172.16.1.0/24 ISIS-L2 15 20 D 3.3.3.2 Vlanif20
As shown in the routing table, the next hop address of the route to 172.16.1.0/24 is 3.3.3.2 and
traffic is transmitted on the active link from Switch A to Switch B.
Step 4 Set the interface cost.
# Configure Switch A.
[SwitchA] interface vlanif 20
[SwitchA-Vlanif20] isis cost 5
[SwitchA-Vlanif20] quit
# Configure Switch B.
[SwitchB] interface vlanif 20
[SwitchB-Vlanif20] isis cost 5
[SwitchB-Vlanif20] quit
Step 5 Configure BFD of the IS-IS process.
# Enable BFD of the IS-IS process on Switch A.
[SwitchA] bfd
[SwitchA-bfd] quit
[SwitchA] isis
[SwitchA-isis-1] bfd all-interfaces enable
[SwitchA-isis-1] quit
# Enable BFD of the IS-IS process on Switch B.
[SwitchB] bfd
[SwitchB-bfd] quit
[SwitchB] isis
[SwitchB-isis-1] bfd all-interfaces enable
[SwitchB-isis-1] quit
# Enable BFD of the IS-IS process on Switch C.
[SwitchC] bfd
[SwitchC-bfd] quit
[SwitchC] isis
[SwitchC-isis-1] bfd all-interfaces enable
[SwitchC-isis-1] quit
# After the preceding configurations are complete, run the display isis bfd session all command
on Switch A, Switch B, or Switch C. You can view that the status of BFD is Up.
Take the display of Switch A as an example:
[SwitchA] display isis bfd session all
BFD session information for ISIS(1)
-----------------------------------
Peer System ID : 0000.0000.0002 Interface : Vlanif20
TX : 10 BFD State : up Peer IP Address : 1.1.1.2
RX : 100 LocDis : 8193 Local IP Address: 1.1.1.1
BFD State : up Peer IP Address : 1.1.1.2
Multiplier : 3 RemDis : 8192 Type : L2
Diag : No diagnostic information
Peer System ID : 0000.0000.0003 Interface : Vlanif10
Multiplier : 3 RemDis : 8192 Type : L2
Diag : No diagnostic information
S6700 Series Ethernet Switches
Configuration Guide - IP Routing 6 IS-IS Configuration
Issue 01 (2012-03-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
350
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