Cisco Systems 3750E manual Configuring RIP, 38-20

Chapter 38 Configuring IP Unicast Routing

Configuring RIP

Switch(config-router)# network 10.0.0.0

Switch(config-router)# end

You can now set up parameters for the selected routing protocols as described in these sections:

•Configuring RIP, page 38-20

•Configuring OSPF, page 38-25

•Configuring EIGRP, page 38-35

•Configuring BGP, page 38-43

•Configuring Unicast Reverse Path Forwarding, page 38-75

•Configuring Protocol-Independent Features, page 38-76(optional)

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 IP base feature set; other routing protocols require the switch or stack master to be running the IP services feature set.

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.

These sections contain this configuration information:

•Default RIP Configuration, page 38-21

•Configuring Basic RIP Parameters, page 38-21

•Configuring RIP Authentication, page 38-23

•Configuring Summary Addresses and Split Horizon, page 38-23

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
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