Static Routing and Distance Vector Routing Protocols - CCIE Routing and Switching Exam Certification Guide - page 325

The output of the show ip protocol command shows the default timers for RIP, as shown in
Example 7-2. The timers can be changed using the timers basic update invalid holddown flush
command .

RIP Timers Verified with show ip protocol Example 7-2

router9>show ip protocol
Routing Protocol is "rip"
Sending updates every 30 seconds, next due in 3 seconds
Invalid after 180 seconds, hold down 180, flushed after 240
Outgoing update filter list for all interfaces is
Incoming update filter list for all interfaces is
Redistributing: rip
Default version control: send version 1, receive any version
Interface Send Recv Triggered RIP Key-chain
Ethernet0 1 1 2
Serial0 1 1 2
Automatic network summarization is in effect
Routing for Networks:
172.16.0.0
Routing Information Sources:
Gateway Distance Last Update
172.16.4.2 120 00:00:00
172.16.1.2 120 00:00:07
Distance: (default is 120)

Sending updates every 30 seconds
Invalid after 180 seconds, hold down 180, flushed after 240

RIPv1 Configuration
The RIPv1 protocol is configured using the global router rip command. You enter the routed
networks with the network command. Figure 7-2 shows a network with three routers. Each
router in this section is configured to route the RIPv1 routing protocol.

Routers in a RIP Network Figure 7-2

Router9

Router10

172.16.4.0/24

.1

.1

.2

.1

172.16.2.0/24

172.16.1.0/24

.2

.1

Router8

172.16.3.0/24