HP 7000 dl Router manual Router rip, Config#router rip config-rip#

SROS Command Line Interface Reference Guide Global Configuration Mode Command Set

router rip

Use the router rip command to enter the RIP Configuration Mode. See the section Router (RIP) Configuration Command Set on page 894 for more information.

Syntax Description

No subcommands.

Default Values

No default values necessary for this command.

Command Modes

(config)# Global Configuration Mode required

Usage Examples

The following example uses the router rip command to enter the RIP Configuration Mode:

(config)#router rip (config-rip)#

Technology Review

The RIP protocol is based on the Bellham-Ford (distance-vector) algorithm. This algorithm provides that a network will converge to the correct set of shortest routes in a finite amount of time, provided that:

Gateways continuously update their estimates of routes.

Updates are not overly delayed and are made on a regular basis.

The radius of the network is not excessive.

No further topology changes take place.

RIP is described in RFC 1058 (Version 1) and updated in RFCs 1721, 1722, and 1723 for Version 2. Version 2 includes components that ease compatibility in networks operating with RIP V1.

All advertisements occur on regular intervals (every 30 seconds). Normally, a route that is not updated for 180 seconds is considered dead. If no other update occurs in the next 60 seconds for a new and better route, the route is flushed after 240 seconds. Consider a connected route (one on a local interface). If the interface fails, an update is immediately triggered for that route only (advertised with a metric of 16).

Now consider a route that was learned and does not receive an update for 180 seconds. The route is marked for deletion, and even if it was learned on an interface, a poisoned (metric =16) route should be sent by itself immediately and during the next two update cycles with the remaining normal split horizon update routes. Following actual deletion, the poison reverse update ceases. If an update for a learned

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