RIP
336
Fig 39-2 Typical application of RIP aggregation
As the above network topology, S2 is connected to S1 through interface vlan1, there
are other 4 subnet routers of S2, which are 192.168.21.0/24, 192.168.22.0/24,
192.168.23.0/24, 192.168.24.0/24. S2 supports route aggregation, and to configure
aggregation route 192.168.20.0/22 in interface vlan1 of S2, after that, sending router
messages to S1 through vlan1, and put the four subnet routers aggregated to one router
as 192.168.20.0/22, and send to S1, and not send subnet to neighbor. It can reduce the
router table of S1, save the memory.
S1 configuration list:
S1(config)#router rip
S1(config-router) #network vlan 1
S2 configuration list:
S2(config)#router rip
S2(config-router) #network vlan 1
S2(config-router) #exit
S2(config)#in vlan 1
S2(Config-if-Vlan1)# ip rip agg 192.168.20.0/22
39.4
RIP Troubleshooting
The RIP protocol may not be working properly due to errors such as physical
connection, configuration error when configuring and using the RIP protocol. So users
should pay attention to following:
First ensure the physic connection is correct
Second, ensure the interface and chain protocol are UP (use
show interface
command)
S1
S2
vlan1:192.168.10.1
vlan1:192.168.10.2
192.168.20.0/22
192.168.21.0/24
192.168.22.0/24
192.168.23.0/24
192.168.24.0/24