47
4. Configure route summarization:
# Configure route summarization on Switch C and advertise only the summary route 10.0.0.0/8.
[SwitchC] interface vlan-interface 300
[SwitchC-Vlan-interface300] rip summary-address 10.0.0.0 8
# Display the IP routing table on Switch D.
[SwitchD] display ip routing-table
Destinations : 12 Routes : 12
Destination/Mask Proto Pre Cost NextHop Interface
0.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
10.0.0.0/8 RIP 100 1 11.3.1.1 Vlan300
11.3.1.0/24 Direct 0 0 11.3.1.2 Vlan300
11.3.1.0/32 Direct 0 0 11.3.1.2 Vlan300
11.3.1.2/32 Direct 0 0 127.0.0.1 InLoop0
11.4.1.0/24 Direct 0 0 11.4.1.2 Vlan400
11.4.1.0/32 Direct 0 0 11.4.1.2 Vlan400
11.4.1.2/32 Direct 0 0 127.0.0.1 InLoop0
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
127.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
Configuring BFD for RIP (single-hop echo detection for a
directly connected neighbor)
Network requirements
As shown in Figure 11, VLAN-interface 100 of Switch A and Switch C runs RIP process 1. VLAN-interface
200 of Switch A runs RIP process 2. VLAN-interface 300 of Switch C and VLAN-interface 200 and
VLAN-interface 300 of Switch B run RIP process 1.
Configure a static route destined for 100.1.1.1/24 and enable static route redistribution into RIP on Switch
C so Switch A can learn two routes destined for 100.1.1.1/24 through VLAN-interface 100 and
VLAN-interface 200 respectively, and uses the one through VLAN-interface 100.
Enable BFD for RIP on VLAN-interface 100 of Switch A. When the link over VLAN-interface 100 fails,
BFD can quickly detect the failure and notify it to RIP so RIP deletes the neighbor relationship and route
information learned on VLAN-interface 100, and uses the route destined for 100.1.1.1 24 through
VLAN-interface 200.
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