Configuring Rip; Default Rip Configuration - Cisco WS-C3560-48PS-S Software Configuration Manual

Chapter 30 Configuring IP Unicast Routing

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.
Note RIP is the only routing protocol supported by the SMI; other routing protocols require running the EMI.
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 30-4
Table 30-4 Default RIP Configuration
Feature
Auto summary
Default-information originate
Default metric
IP RIP authentication key-chain No authentication.
IP RIP receive version
IP RIP send version
IP RIP triggered
IP split horizon
78-16156-01
Default RIP Configuration, page 30-19
Configuring Basic RIP Parameters, page 30-20
Configuring RIP Authentication, page 30-21
Configuring Summary Addresses and Split Horizon, page 30-22
shows the default RIP configuration.
Default Setting
Enabled.
Disabled.
Built-in; automatic metric translations.
Authentication mode: clear text.
According to the version router configuration command.
According to the version router configuration command.
According to the version router configuration command.
Varies with media.
Catalyst 3560 Switch Software Configuration Guide
Configuring RIP
30-19