Chapter 12: BGP Configuration Guide

Router SSR8 has the following CLI configuration:

interface add ip xleapnl address-netmask 212.19.192.2/24

interface create ip hobbygate address-netmask 212.19.199.62/24 port et.1.2

interface create ip xenosite address-netmask 212.19.198.1/24 port et.1.7

interface add ip lo0 address-netmask 212.19.192.1/30

bgp create peer-group webnet type external autonomous system 64901 bgp add peer-host 194.109.86.5 group webnet

#

#Create an aggregate route for 212.19.192.0/19 with all its subnets as

#contributing routes

#

ip-router policy summarize route 212.19.192.0/19

ip-router policy redistribute from-proto aggregate to-proto bgp target- as 64901 network 212.19.192.0/19

ip-router policy redistribute from-proto direct to-proto bgp target-as 64901 network all restrict

Router SSR9 has the following CLI configuration:

bgp create peer-group rtr8 type external autonomous system 64900 bgp add peer-host 194.109.86.6 group rtr8

Route Reflection Example

In some ISP networks, the internal BGP mesh becomes quite large, and the IBGP full mesh does not scale well. For such situations, route reflection provides a way to alleviate the need for a full IBGP mesh. In route reflection, the clients peer with the route reflector and exchange routing information with it. In turn, the route reflector passes on (reflects) information between clients.

The IBGP peers of the route reflector fall under two categories: clients and non-clients. A route reflector and its clients form a cluster. All peers of the route reflector that are not part of the cluster are non-clients. The SSR supports client peers as well as non-client peers of a route reflector.

SmartSwitch Router User Reference Manual

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Cabletron Systems 9032578-05 manual Route Reflection Example, Router SSR8 has the following CLI configuration