Network Requirements
- RIPv2 runs between Device1, Device2, Device3, and Device4 for route interaction.
- Device1 learns two routes 100.1.0.0/24 and 100.2.0.0/24 from Device2. To reduce the size of the routing table of Device1, it is required that Device advertises only the route summary of the two routes to Device1.
Network Topology
Figure 5-5 Networking for Configuring RIP Route Summary
Configuration Steps
Step 1: Create VLANs, and add ports to the required VLANs. (Omitted)
Step 2: Configure IP addresses for the ports. (Omitted)
Step 3: Configure RIP.
#Configure Device1.
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Device1#configure terminal
Device1(config)#router rip
Device1(config-rip)#version 2
Device1(config-rip)#network 1.0.0.0
Device1(config-rip)#exit
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#Configure Device2.
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Device2#configure terminal
Device2(config)#router rip
Device2(config-rip)#version 2
Device2(config-rip)#network 1.0.0.0
Device2(config-rip)#network 2.0.0.0
Device2(config-rip)#network 3.0.0.0
Device2(config-rip)#exit
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#Configure Device3.
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Device3#configure terminal
Device3(config)#router rip
Device3(config-rip)#version 2
Device3(config-rip)#network 2.0.0.0
Device3(config-rip)#network 100.0.0.0
Device3(config-rip)#exit
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#Configure Device4.
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Device4#configure terminal
Device4(config)#router rip
Device4(config-rip)#version 2
Device4(config-rip)#network 3.0.0.0
Device4(config-rip)#network 100.0.0.0
Device4(config-rip)#exit
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#Query the routing table of Device1.
Device1#show ip route
Codes: C - Connected, L - Local, S - static, R - RIP, B - BGP, i-ISIS
U - Per-user Static route
O - OSPF, OE-OSPF External, M - Management, E - IRMP, EX - IRMP external
C 1.0.0.0/24 is directly connected, 00:23:06, vlan2
R 2.0.0.0/24 [120/1] via 1.0.0.2, 00:13:26, vlan2
R 3.0.0.0/24 [120/1] via 1.0.0.2, 00:13:26, vlan2
R 100.1.0.0/24 [120/2] via 1.0.0.2, 00:08:31, vlan2
R 100.2.0.0/24 [120/2] via 1.0.0.2, 00:08:31, vlan2
C 127.0.0.0/8 is directly connected, 76:51:00, lo0
Step 4: Configure a summary of routes on an interface.
#On Device2, configure a route summary 100.0.0.0/8.
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Device2(config)#interface vlan2
Device2(config-if-vlan2)#ip summary-address rip 100.0.0.0/8
Device2(config-if-vlan2)#exit
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Step 5: Check the result.
#Query the routing table of Device1.
Device1#show ip route
Codes: C - Connected, L - Local, S - static, R - RIP, B - BGP, i-ISIS
U - Per-user Static route
O - OSPF, OE-OSPF External, M - Management, E - IRMP, EX - IRMP external
C 1.0.0.0/24 is directly connected, 00:24:06, vlan2
R 2.0.0.0/24 [120/1] via 1.0.0.2, 00:14:26, vlan2
R 3.0.0.0/24 [120/1] via 1.0.0.2, 00:14:26, vlan2
R 100.0.0.0/8 [120/2] via 1.0.0.2, 00:00:31, vlan2
C 127.0.0.0/8 is directly connected, 76:51:00, lo0
On Device1, the route summary 100.0.0.0/8 advertised by Device2 and learnt by Device1 is displayed. The two routes that are contained in the route summary can be deleted only after timeout.
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RIP supports global auto route summary and interface manual route summary. In RIPv2, the global auto route summary function is disabled.
Switch
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