Static Routing and Distance Vector Routing Protocols - CCIE Routing and Switching Exam Certification Guide - page 336

Example 7-16 Example of debug ip rip Command

router10#debug ip rip
RIP protocol debugging is on
router10#
00:23:43: RIP: received v2 update from 172.16.4.1 on Serial0
00:23:44: 172.16.1.0/24 via 0.0.0.0 in 1 hops
00:23:44: 172.16.3.0/28 via 0.0.0.0 in 2 hops
00:23:50: RIP: sending v2 update to 224.0.0.9 via Serial0 (172.16.4.2)
00:23:50: RIP: build update entries
00:23:50: 172.16.2.0/24 via 0.0.0.0, metric 1, tag 0
00:24:11: RIP: received v2 update from 172.16.4.1 on Serial0
00:24:11: 172.16.1.0/24 via 0.0.0.0 in 1 hops
00:24:11: 172.16.3.0/28 via 0.0.0.0 in 2 hops
00:24:20: RIP: sending v2 update to 224.0.0.9 via Serial0 (172.16.4.2)
00:24:20: RIP: build update entries
00:24:20: 172.16.2.0/24 via 0.0.0.0, metric 1, tag 0
00:24:37: RIP: received v2 update from 172.16.4.1 on Serial0
00:24:37: 172.16.1.0/24 via 0.0.0.0 in 1 hops
00:24:37: 172.16.3.0/28 via 0.0.0.0 in 2 hops
00:24:46: RIP: build update entries
00:24:46: 172.16.2.0/24 via 0.0.0.0, metric 1, tag 0

received v2 update

sending v2 update

received v2 update

sending v2 update

received v2 update

RIPv2 Summary
The characteristics of RIPv2 are summarized as follows:
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Distance vector protocol.

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Uses UDP port 520.

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Classless protocol (support for CIDR).

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Supports VLSM.

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Metric is router hop count.

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Maximum hop count is 15; infinite (unreachable) routes have a metric of 16.

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Periodic route updates sent every 30 seconds to multicast address 224.0.0.9.

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25 routes per RIP message (24 if you use authentication).

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Supports authentication.

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Implements split horizon with poison reverse.

•

Implements triggered updates.

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Subnet mask included in route entry.

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Administrative distance for RIPv2 is 120.