H3C Technologies H3C S12500 Series Switches - Manual (Page 367)

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Destination: 2001:3:: PrefixLen: 64
Flag : D/L/- Cost : 10
Next Hop : Direct Interface: Vlan300
Destination: 2001:4::1 PrefixLen: 128
Flag : D/L/- Cost : 0
Next Hop : Direct Interface: Loop1
Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set
Configuring BFD for IS-IS
Network requirements
As shown in Figure 116 , configure IPv6 IS-IS on Switch A, Switch B and Switch C and configure BFD over
the link Switch A<—>L2 Switch<—>Switch B.
After the link between Switch B and the Layer-2 switch fails, BFD can quickly detect the failure and notify
IPv6 IS-IS of the failure. Then Switch A and Switch B communicate through Switch C.
Figure 116 Network diagram
Device Interface IPv6 address Device Interface IPv6 address
Switch A Vlan-int10 2001::1/64 Switch B Vlan-int10 2001::2/64
Vlan-int11 2001:2::1/64 Vlan-int13 2001:3::2/64
Switch C Vlan-int11 2001:2::2/64
Vlan-int13 2001:3::1/64
Configuration procedure
1. Configure IP addresses for interfaces. (Details not shown.)
2. Configure IPv6 IS-IS:
# Configure Switch A.
<SwitchA> system-view
[SwitchA] ipv6
[SwitchA] isis 1
[SwitchA-isis-1] is-level level-1
[SwitchA-isis-1] network-entity 10.0000.0000.0001.00
[SwitchA-isis-1] ipv6 enable