notes: RIP version, Update Types

- By default, a RIP process configured on a Cisco router sends only RIPv1 messages but listens to both RIPv1 and RIPv2.

V1

- classfull ( class A, B, C)
- default RIP configuration
- send updated as broadcast

v2
- supports VLSM/subnet mask/classless
- route summarization
-external route tags
- authentication
- uses multicast address for updates (224.0.0.9)
- "version 2" to enable v2 under RIP routing process
- The version 2 command causes RIP to send and listen to RIPv2 messages only.

note: v1 and v2 can received v1 & v2 updates by default.

to change the sending and receiving behavior using global under process

router rip
ip rip send v1
ip rip receive v1 v2


under interface:

ip rip receive version 1 2


*===================================*
Updates Types
*===================================*

1. Broadcast

- Default for RIPv1
- RIPv2 optional

to Enable broadcasts at a interface level for RIPv2.

ip rip v2-broadcast

note:it doesn't reflect in the "show ip protocols"

verification

debug ip rip

2. Multicast

- RIPv2 default to 224.0.0.9


3. Unicast

- RIPv1/RIPv2 optional

Under the process, send unicast updates to neighbor
- Useful on NBMA networks like frame-relay
- This does not stop the sending of broad/multicasts, use "passive-interfaces" for that

neighbor {IP}

Note: network statement should be there in which the neighbor belongs.

verification:

1. debug ip packets

2. show ip protocols