Configuring Rip; Default Rip Configuration - Cisco Catalyst 3750 Software Configuration Manual

Configuring RIP

You can now set up parameters for the selected routing protocols as described in these sections:
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You can also configure nonprotocol-specific features:
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Configuring RIP
The Routing Information Protocol (RIP) is an interior gateway protocol (IGP) created for use in small,
homogeneous networks. It is a distance-vector routing protocol that uses broadcast User Datagram
Protocol (UDP) data packets to exchange routing information. The protocol is documented in RFC 1058.
You can find detailed information about RIP in IP Routing Fundamentals, published by Cisco Press.
Using RIP, the switch sends routing information updates (advertisements) every 30 seconds. If a router
does not receive an update from another router for 180 seconds or more, it marks the routes served by
that router as unusable. If there is still no update after 240 seconds, the router removes all routing table
entries for the non-updating router.
RIP uses hop counts to rate the value of different routes. The hop count is the number of routers that can
be traversed in a route. A directly connected network has a hop count of zero; a network with a hop count
of 16 is unreachable. This small range (0 to 15) makes RIP unsuitable for large networks.
If the router has a default network path, RIP advertises a route that links the router to the pseudonetwork
0.0.0.0. The 0.0.0.0 network does not exist; it is treated by RIP as a network to implement the default
routing feature. The switch advertises the default network if a default was learned by RIP or if the router
has a gateway of last resort and RIP is configured with a default metric. RIP sends updates to the
interfaces in specified networks. If an interface's network is not specified, it is not advertised in any
RIP update.
This section briefly describes how to configure RIP. It includes this information:
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Default RIP Configuration

Table 28-4
Catalyst 3750 Metro Switch Software Configuration Guide
28-18
Configuring RIP, page 28-18
Configuring IGRP, page 28-23
Configuring OSPF, page 28-28
Configuring EIGRP, page 28-37
Configuring BGP, page 28-43
Configuring ISO CLNS Routing, page 28-63
Configuring Multi-VRF CE, page 28-76
Configuring Protocol-Independent Features, page 28-86
Default RIP Configuration, page 28-18
Configuring Basic RIP Parameters, page 28-19
Configuring RIP Authentication, page 28-21
Configuring Summary Addresses and Split Horizon, page 28-21
shows the default RIP configuration.
Chapter 28 Configuring IP Unicast Routing
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