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BFD for IS-IS configuration example
Network requirements
• As shown in Figure 46, run IS-IS on Switch A, Switch B and Switch C so that can reach each other
at the network layer.
• After the link over which Switch A and Switch B communicate through the Layer-2 switch fails, BFD
can quickly detect the failure and notify IS-IS of the failure. Switch A and Switch B then communicate
through Switch C.
Figure 46 Network diagram
Device Interface IP address Device Interface IP address
Switch A Vlan-int10 10.1.0.102/24
Switch B
Vlan-int10 10.1.0.100/24
Vlan-int11 11.1.1.1/24
Vlan-int13 13.1.1.1/24
Switch C Vlan-int11 11.1.1.2/24
Vlan-int13 13.1.1.2/24
Configuration procedure
1. Configure IP addresses for interfaces. (Details not shown.)
2. Configure basic IS-IS:
# Configure Switch A.
<SwitchA> system-view
[SwitchA] isis
[SwitchA-isis-1] network-entity 10.0000.0000.0001.00
[SwitchA-isis-1] quit
[SwitchA] interface vlan-interface 10
[SwitchA-Vlan-interface10] isis enable
[SwitchA-Vlan-interface10] quit
[SwitchA] interface vlan-interface 11
[SwitchA-Vlan-interface11] isis enable
[SwitchA-Vlan-interface11] quit
# Configure Switch B.
<SwitchB> system-view
[SwitchB] isis
[SwitchB-isis-1] network-entity 10.0000.0000.0002.00
[SwitchB-isis-1] quit
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