3Com S7902E, Configuration Manual

Page: 924 / 2621

i
Table of Contents
1 Route Policy Configuration ······················································································································1-1
Introduction to Route Policy ····················································································································1-1
Route Policy and Policy Routing ·····································································································1-1
Filters ···············································································································································1-1
Route Policy Application··················································································································1-3
Route Policy Configuration Task List ······································································································1-3
Defining Filters ········································································································································1-3
Prerequisites····································································································································1-3
Defining an IP-prefix List ·················································································································1-3
Defining an AS Path List··················································································································1-5
Defining a Community List ··············································································································1-5
Defining an Extended Community List ····························································································1-5
Configuring a Route Policy ·····················································································································1-6
Prerequisites····································································································································1-6
Creating a Route Policy···················································································································1-6
Defining if-match Clauses················································································································1-7
Defining apply Clauses····················································································································1-8
Displaying and Maintaining the Route Policy························································································1-10
Route Policy Configuration Example ····································································································1-10
Applying a Route Policy to IPv4 Route Redistribution ··································································1-10
Applying a Route Policy to IPv6 Route Redistribution ··································································1-13
Applying a Route Policy to Filter Received BGP Routes ······························································1-15
Troubleshooting Route Policy Configuration ························································································1-17
IPv4 Routing Information Filtering Failure ·····················································································1-17
IPv6 Routing Information Filtering Failure ·····················································································1-18