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CCNP 1 v3.0 Module 4 Routing Information Protocol version 2

CCNP 1 v3.0 Module 4 Routing Information Protocol version 2 . Objectives. RIP v2 Overview Configuring RIP v2 Verifying RIP v2 Operation. RIP v2 Operation. Issues Addressed by RIP v2. Authentication Addition of subnet masks and VLSM Next hop IP addressed

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CCNP 1 v3.0 Module 4 Routing Information Protocol version 2

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  1. CCNP 1 v3.0 Module 4Routing Information Protocol version 2

  2. Objectives • RIP v2 Overview • Configuring RIP v2 • Verifying RIP v2 Operation

  3. RIP v2 Operation

  4. Issues Addressed by RIP v2 • Authentication • Addition of subnet masks and VLSM • Next hop IP addressed • Multicasting RIP v2 routing updates

  5. RIP v2 Message Format

  6. Compatibility with RIP v1 • RFC 1723 defines a compatibility switch with four settings, which allows versions 1 and 2 to interoperate: • RIP v1, in which only RIP v1 messages are transmitted. • RIP v1 Compatibility, which causes RIP v2 to broadcast its messages instead of multicast them so that RIP v1 may receive them. • RIP v2, in which RIP v2 messages are multicast to destination address 224.0.0.9. • None, in which no updates are sent.

  7. Classless Route Lookups Classless routing protocols allow us to summarize these routes

  8. Classless Routing Protocols

  9. RIP v2 Authentication

  10. Limitations of RIP v2 • The more significant limitations that were inherited by RIP v2 include the following: • Lack of alternative routes • Counting to infinity • 15-hop maximum • Static distance vector metrics

  11. Basic RIP v2 Configuration

  12. Discontiguous Subnets and Classless Routing • The same rules of discontiguous subnets applies to RIPv2 as • we have discussed with EIGRP. • Use the ‘no auto-summary’ command when you have • discontiguous subnets.

  13. Configuring Authentication • The steps for setting up RIP v2 authentication are as follows: • Define a key chain with a name. • Define the key or keys on the key chain. • Enable authentication on an interface and specify the key chain to be used. • Specify whether the interface will use clear text or MD5 authentication. • Optionally configure key management.

  14. Configuration tasks for RIP Authentication Vista(config)#key chain PRIVATE Vista(config-keychain)#key 1 Vista(config-keychain-key)#key-string <key_string_value> Vista(config)#interface serial 0/0 Vista(config-if)#ip rip authentication key-chain PRIVATE Vista(config-if)#ip rip authentication mode md5 The matching configuration would then have to be done on the next directly connected router.

  15. Verifying RIP v2 Operation: show ip protocols command

  16. Verifying RIP v2 Operation: show ip route command

  17. Debug Commands • Two configuration problems common to RIP v2 • mismatched versions • improperly configured authentication • Use the debug ip rip EXEC command to display information on RIP routing transactions • Router#debug ip rip [events] • Use the debug ip routing EXEC command to display information on RIP routing table updates and route-cache updates • Router#debug ip routing

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