Migrating from RIP to EIGRP

By arfs -

Routers Used: 3640 w/ NM-4T and NM-1FE-TX modules

IOS: c3640-jk9s-mz.124-16a

Objective
  • In this lab, configure RIP v2 and then EIGRP so that their metric calculations can be compared.
Scenario
  • International Travel Agency (ITA) currently uses RIP v2 as its interior gateway protocol. Migrate its network to EIGRP.
Step 1
  • Build and configure the network according to the diagram.
    Note: PC1 and PC2 are not required to complete this lab, but they might be used in
    testing or as Telnet clients. If used, the PC1 gateway may be either Dion1 router or the Dion2 router.
  • On all three routers, configure RIP v2 and enable updates on all active interfaces with the network command:
    Dion1(config)#router rip
    Dion1(config-router)#version 2
    Dion1(config-router)#network 192.168.1.0
    Dion1(config-router)#network 10.0.0.0

    Dion2(config)#router rip
    Dion2(config-router)#version 2
    Dion2(config-router)#network 192.168.2.0
    Dion2(config-router)#network 10.0.0.0

    Arief(config)#router rip
    Arief(config-router)#version 2
    Arief(config-router)#network 192.168.1.0
    Arief(config-router)#network 192.168.2.0
    Arief(config-router)#network 192.168.3.0
  • Use ping and show ip route to verify full connectivity within the network.
Step 2
  • While migrating to EIGRP, leave RIP running on all the routers to avoid a loss of connectivity. On Dion1 and Dion2, configure EIGRP for Autonomous System 24. Do not configure Arief for EIGRP yet.
    Dion1(config)#router eigrp 24
    Dion1(config-router)#network 192.168.1.0
    Dion1(config-router)#network 10.0.0.0

    Dion2(config)#router eigrp 24
    Dion2(config-router)#network 192.168.2.0
    Dion2(config-router)#network 10.0.0.0
Step 3
  • From the Arief console, issue the show ip route command. The EIGRP has not be configured on this router yet. Therefore, a route has been established to the 10.0.0.0 /8 network through the RIP.
  • Enable debug so that changes to the routing table will be reported to the console.
    Arief#debug ip routing
  • Now enable EIGRP on Arief.
    Arief(config)#router eigrp 24
    Arief(config-router)#network 192.168.1.0
    Arief(config-router)#network 192.168.2.0
    Arief(config-router)#network 192.168.3.0
  • Issue the show ip route command again from Arief. There should now be an EIGRP route to network 10.0.0.0 /8.
Step 4
  • To see more with the debug ip routing command, force the routing table to rebuild with this command:
    Arief#clear ip route *
Step 5
  • To complete the migration from RIP to EIGRP, disable RIP on all three routers using the command no router rip.
  • Next, enter the command show ip route:
    Arief#show ip route
    Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
    D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
    N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
    E1 - OSPF external type 1, E2 - OSPF external type 2
    i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
    ia - IS-IS inter area, * - candidate default, U - per-user static route
    o - ODR, P - periodic downloaded static route

    Gateway of last resort is not set

    D 10.0.0.0/8 [90/2172416] via 192.168.2.2, 00:50:01, Serial0/1
    [90/2172416] via 192.168.1.2, 00:50:01, Serial0/0
    C 192.168.1.0/24 is directly connected, Serial0/0
    C 192.168.2.0/24 is directly connected, Serial0/1
    C 192.168.3.0/24 is directly connected, FastEthernet1/0
  • Turn off debug before exiting the Arief router.
    Arief#no debug all
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