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You are here: Home / Version 2

Version 2

Command

Version 2

Use

Switches router rip version to version 2.

The benefits of rip version 2 are:
-Increased security
-More efficient (uses multicast instead of broadcast)
-Supports classless addresses

Syntax

Router(config-router)#version 2

Example

Here is the version 1 debug for R3.

R3(config-router)#do debug ip rip
RIP protocol debugging is on
R3(config-router)#
*Mar 1 05:07:45.818: RIP: sending v1 update to 255.255.255.255 via FastEthernet0/0 (10.2.2.3)
*Mar 1 05:07:45.822: RIP: build update entries
*Mar 1 05:07:45.826: network 3.0.0.0 metric 1
*Mar 1 05:07:46.426: RIP: sending v1 update to 255.255.255.255 via Loopback0 (3.3.3.3)
*Mar 1 05:07:46.430: RIP: build update entries
*Mar 1 05:07:46.430: network 1.0.0.0 metric 3
*Mar 1 05:07:46.434: network 2.0.0.0 metric 1
*Mar 1 05:07:46.434: network 10.0.0.0 metric 1
R3(config-router)#
*Mar 1 05:07:52.470: RIP: received v1 update from 10.2.2.2 on FastEthernet0/0
*Mar 1 05:07:52.474: 1.0.0.0 in 1 hops
*Mar 1 05:07:52.478: 2.0.0.0 in 1 hops
*Mar 1 05:07:52.482: 10.1.1.0 in 1 hops
R3(config-router)#
*Mar 1 05:07:54.478: RIP: sending v1 flash update to 255.255.255.255 via FastEthernet0/0 (10.2.2.3)
*Mar 1 05:07:54.482: RIP: build flash update entries – suppressing null update
*Mar 1 05:07:54.486: RIP: sending v1 flash update to 255.255.255.255 via Loopback0 (3.3.3.3)
*Mar 1 05:07:54.490: RIP: build flash update entries
*Mar 1 05:07:54.490: network 1.0.0.0 metric 1

Next, version 2 is configured for all routers using the below commands.

R3#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R3(config)#router rip
R3(config-router)#version 2

Here is the version 2 debug. Notice the multicast address 224.0.0.9

R3(config-router)#version 2
R3(config-router)#do debug ip rip
RIP protocol debugging is on
R3(config-router)#
*Mar 1 05:09:11.090: RIP: sending v2 update to 224.0.0.9 via FastEthernet0/0 (10.2.2.3)
*Mar 1 05:09:11.094: RIP: build update entries
*Mar 1 05:09:11.098: 3.0.0.0/8 via 0.0.0.0, metric 1, tag 0
R3(config-router)#
*Mar 1 05:09:12.290: RIP: sending v2 update to 224.0.0.9 via Loopback0 (3.3.3.3)
*Mar 1 05:09:12.294: RIP: build update entries
*Mar 1 05:09:12.294: 1.0.0.0/8 via 0.0.0.0, metric 1, tag 0
*Mar 1 05:09:12.298: 2.0.0.0/8 via 0.0.0.0, metric 1, tag 0
*Mar 1 05:09:12.302: 10.0.0.0/8 via 0.0.0.0, metric 1, tag 0
*Mar 1 05:09:12.310: RIP: ignored v2 packet from 3.3.3.3 (sourced from one of our addresses)

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