Configuring Simple Routing Policies; Redistributing Static Routes - Cabletron Systems IA1100 User's Reference Manual

Chapter 9: Routing Policy Configuration Guide

Configuring Simple Routing Policies

Simple routing policies provide an efficient way for routing information to be exchanged
between routing protocols. The redistribute command can be used to redistribute routes
from one routing domain into another routing domain. Redistribution of routes between
routing domains is based on route policies. A route policy is a set of conditions based on
which routes are redistributed. While the redistribute command may fulfill the export
policy requirement for most users, complex export policies may require the use of the
commands listed under Export Policies.
The general syntax of the redistribute command is as follows:
ip-router policy redistribute from-proto <protocol> to-proto <protocol> [network <ipAddr-
mask> [exact|refines|between <low-high>]] [metric <number>|restrict] [source-as
<number>] [target-as <number>]
The from-proto parameter specifies the protocol of the source routes. The values for the
from-proto parameter can be rip, ospf, bgp, direct, static, aggregate and ospf-ase. The to-
proto parameter specifies the destination protocol where the routes are to be exported.
The values for the to-proto parameter can be rip, ospf and bgp. The network parameter
provides a means to define a filter for the routes to be distributed. The network parameter
defines a filter that is made up of an IP address and a mask. Routes that match the filter
are considered as eligible for redistribution.
Every protocol (RIP, OSPF, and BGP) has a configurable parameter that specifies the
default-metric associated with routes exported to that protocol. If a metric is not explicitly
specified with the redistribute command, then it is inherited from the default-metric
associated with the protocol to which the routes are being exported.

Redistributing Static Routes

Static routes may be redistributed to another routing protocol such as RIP or OSPF by the
following command. The network parameter specifies the set of static routes that will be
redistributed by this command. If all static routes are to be redistributed set the network
parameter to all. Note that the network parameter is a filter that is used to specify routes
that are to be redistributed.
To redistribute static routes, enter one of the following commands in Configure mode:
To redistribute static routes
into RIP.
To redistribute static routes
into OSPF.
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ip-router policy redistribute from-proto
static to-proto rip network all
ip-router policy redistribute from-proto
static to-proto ospf network all
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