LevelOne GTL-2691 User Manual

Page 1464

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HAPTER

49

| IP Routing Commands

Routing Information Protocol (RIP)

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OMMAND

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ODE

Router Configuration

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OMMAND

U

SAGE

When a metric value has not been configured by the redistribute

command, the

default-metric

command sets the metric value to be

used for all imported external routes.

A route metric must be used to resolve the problem of redistributing

external routes with incompatible metrics.

It is advisable to use a low metric when redistributing routes from

another protocol into RIP. Using a high metric limits the usefulness of

external routes redistributed into RIP. For example, if a metric of 10 is

defined for redistributed routes, these routes can only be advertised to

routers up to 5 hops away, at which point the metric exceeds the

maximum hop count of 15. By defining a low metric of 1, traffic can

follow a imported route the maximum number of hops allowed within a

RIP domain. However, using a low metric can increase the possibility of

routing loops For example, this can occur if there are multiple

redistribution points and the router learns about the same external

network with a better metric from a redistribution point other than that

derived from the original source.

E

XAMPLE

This example redistributes routes learned from OSPF and sets the metric

for all external routes imported from OSPF to a value of 3.

Console(config-router)#redistribute ospf metric 3

Console(config-router)#

This example redistributes static routes and sets the metric for all of these

routes to a value of 3.

Console(config-router)#redistribute static metric 3

Console(config-router)#

R

ELATED

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OMMANDS

default-metric (1459)

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