RIP summary route advertisement configuration example
Network requirements
As shown in Figure 10, Switch A, Switch B, Switch C, and Switch D all run RIP..
Enable RIP process 100 on Switch C and Switch D so that they can exchange route information.
Enable RIP process 200 on Switch A, Switch B, and Switch C so that they can exchange route information.
Configure Switch C to redistribute routes from RIP process 200 and direct routes for RIP process 100.
To reduce the routing table size of Switch D, configure route summarization on Switch C to advertise only the summary route 10.0.0.0/8 to Switch D.
Figure 10: Network diagram
Configuration procedure
Configure IP addresses for interfaces. (Details not shown.)
Configure basic RIP:
# Configure Switch A.
[SwitchA] rip 200 [SwitchA-rip-200] version 2 [SwitchA-rip-200] undo summary [SwitchA-rip-200] network 10.2.1.0 [SwitchA-rip-200] network 10.5.1.0
# Configure Switch B.
[SwitchB] rip 200 [SwitchB-rip-200] version 2 [SwitchB-rip-200] undo summary [SwitchB-rip-200] network 10.1.1.0 [SwitchB-rip-200] network 10.6.1.0
# Configure Switch C.
[SwitchC] rip 100 [SwitchC-rip-100] version 2 [SwitchC-rip-100] undo summary [SwitchC-rip-100] network 11.3.1.0 [SwitchC-rip-100] quit [SwitchC] rip 200 [SwitchC-rip-200] version 2 [SwitchC-rip-200] undo summary [SwitchC-rip-200] network 10.2.1.0 [SwitchC-rip-200] quit
# Configure Switch D.
[SwitchD] rip 100 [SwitchD-rip-100] version 2 [SwitchD-rip-100] undo summary [SwitchD-rip-100] network 11.3.1.0 [SwitchD-rip-100] network 11.4.1.0 [SwitchD-rip-100] quit
# Configure Switch C to redistribute routes from RIP process 200 and direct routes for RIP process 100.
[SwitchC] rip 100 [SwitchC-rip-100] import-route direct [SwitchC-rip-100] import-route rip 200 [SwitchC-rip-100] quit
# Display the IP routing table on Switch D.
[SwitchD] display ip routing-table Destinations : 15 Routes : 15 Destination/Mask Proto Pre Cost NextHop Interface 0.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0 10.1.1.0/24 RIP 100 1 11.3.1.1 Vlan300 10.2.1.0/24 RIP 100 1 11.3.1.1 Vlan300 10.5.1.0/24 RIP 100 1 11.3.1.1 Vlan300 10.6.1.0/24 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
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