51
Protocol: RIP Process ID: 1
SubProtID: 0x1 Age: 04h20m37s
Cost: 1 Preference: 100
Tag: 0 State: Active Adv
OrigTblID: 0x0 OrigVrf: default-vrf
TableID: 0x2 OrigAs: 0
NibID: 0x26000002 LastAs: 0
AttrID: 0xffffffff Neighbor: 192.168.1.2
Flags: 0x1008c OrigNextHop: 192.168.1.2
Label: NULL RealNextHop: 192.168.1.2
BkLabel: NULL BkNextHop: N/A
Tunnel ID: Invalid Interface: Vlan-interface100
BkTunnel ID: Invalid BkInterface: N/A
The output shows that Switch A communicates with Switch C through VLAN-interface 100. Then the
link over VLAN-interface 100 fails.
# Display RIP routes destined for 120.1.1.0/24 on Switch A.
<SwitchA> display ip routing-table 120.1.1.0 24 verbose
Summary Count : 1
Destination: 120.1.1.0/24
Protocol: RIP Process ID: 2
SubProtID: 0x1 Age: 04h20m37s
Cost: 1 Preference: 100
Tag: 0 State: Active Adv
OrigTblID: 0x0 OrigVrf: default-vrf
TableID: 0x2 OrigAs: 0
NibID: 0x26000002 LastAs: 0
AttrID: 0xffffffff Neighbor: 192.168.2.2
Flags: 0x1008c OrigNextHop: 192.168.2.2
Label: NULL RealNextHop: 192.168.2.2
BkLabel: NULL BkNextHop: N/A
Tunnel ID: Invalid Interface: Vlan-interface200
BkTunnel ID: Invalid BkInterface: N/A
The output shows that Switch A communicates with Switch C through VLAN-interface 200.
BFD for RIP configuration example (single hop echo
detection for a specific destination)
Network requirements
As shown in Figure 12, VLAN-interface 100 of Switch A and Switch B runs RIP process 1.
VLAN-interface 200 of Switch B and Switch C runs RIP process 1.
• Configure a static route destined for 100.1.1.0/24 and enable static route redistribution into RIP
on both Switch A and Switch C. This allows Switch B to learn two routes destined for
100.1.1.0/24 through VLAN-interface 100 and VLAN-interface 200. The route redistributed from
Switch A has a smaller cost than that redistributed from Switch C, so Switch B uses the route
through VLAN-interface 200.
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