Summarize Routes - Dell C9000 Series Networking Configuration Manual

Hide thumbs Also See for C9000 Series:

Table of Contents

route-map-name: The name of a configured route map.

To confirm that the default route configuration is completed, use the show config command in ROUTER

Summarize Routes

Routes in the RIPv2 routing table are summarized by default, thus reducing the size of the routing table and

improving routing efficiency in large networks.

By default, the autosummary command in ROUTER RIP mode is enabled and summarizes RIP routes up to

the classful network boundary.

If you must perform routing between discontiguous subnets, disable automatic summarization. With

automatic route summarization disabled, subnets are advertised.

The autosummary command requires no other configuration commands. To disable automatic route

summarization, enter no autosummary in ROUTER RIP mode.

If you enable the ip split-horizon command on an interface, the system does not advertise

the summarized address.

Controlling Route Metrics

As a distance-vector protocol, RIP uses hop counts to determine the best route, but sometimes the shortest

hop count is a route over the lowest-speed link.

To manipulate RIP routes so that the routing protocol prefers a different route, manipulate the route by using

the offset command.

Exercise caution when applying an offset command to routers on a broadcast network, as the router using

the offset command is modifying RIP advertisements before sending out those advertisements.

The distance command also allows you to manipulate route metrics. To assign different weights to routes

so that the ones with the lower weight or administrative distance assigned are preferred, use the distance

To set route matrixes, use the following commands.

Apply a weight to all routes or a specific route and ACL.

ROUTER RIP mode

distance weight [ip-address mask [access-list-name]]

Configure the following parameters:

weight: the range is from 1 to 255. The default is 120.

ip-address mask: the IP address in dotted decimal format (A.B.C.D), and the mask in slash format

access-list-name: the name of a configured IP ACL.

Apply an additional number to the incoming or outgoing route metrics.

ROUTER RIP mode

offset-list access-list-name {in | out} offset [interface]

Configure the following parameters:

Routing Information Protocol (RIP)