191
FtnIndex: 0x0 TrafficIndex: N/A
Connector: N/A
The output shows that Switch A and Switch B communicate through VLAN-interface 10. Then the
link over VLAN-interface 10 fails.
# Display routes destined for 120.1.1.1/32 on Switch A.
<SwitchA> display ip routing-table 120.1.1.1 verbose
Summary Count : 1
Destination: 120.1.1.1/32
Protocol: IS_L1
Process ID: 1
SubProtID: 0x1 Age: 04h20m37s
Cost: 20 Preference: 10
IpPre: N/A QosLocalID: N/A
Tag: 0 State: Active Adv
OrigTblID: 0x0 OrigVrf: default-vrf
TableID: 0x2 OrigAs: 0
NibID: 0x26000002 LastAs: 0
AttrID: 0xffffffff Neighbor: 0.0.0.0
Flags: 0x1008c OrigNextHop: 10.1.1.100
Label: NULL RealNextHop: 10.1.1.100
BkLabel: NULL BkNextHop: N/A
Tunnel ID: Invalid Interface: Vlan-interface11
BkTunnel ID: Invalid BkInterface: N/A
FtnIndex: 0x0 TrafficIndex: N/A
Connector: N/A
The output shows that Switch A and Switch B communicate through VLAN-interface 11.
IS-IS FRR configuration example
Network requirements
As shown in Figure 50, Switch A, Switch B, and Switch C belong to the same IS-IS routing domain.
Configure IS-IS FRR so that when the Link A fails, traffic can be switched to Link B immediately.
Figure 50 Network diagram
Switch A Switch B
Switch C
Loop0
Vlan-int100
Vlan-int200
Vlan-int200
Vlan-int100
Vlan-int101
Vlan-int101
Loop0
Link A
Link B
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