Cabletron Systems SmartSwitch Router 9032578-02 - Manual (Page 101)

SmartSwitch Router User Reference Manual 101
Chapter 6: BGP Configuration Guide
EBGP Aggregation Example
Figure 9 shows a simple EBGP configuration in which one peer is exporting an aggregated
route to its upstream peer and restricting the advertisement of contributing routes to the
same peer. The aggregated route is 212.19.192.0/19.
Figure 9. Sample BGP Configuration (Route Aggregation)
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
Physical Link
Legend:
Peering Relationship
AS-64901
SSR8
212.19.199.62/24
SSR9
AS-64900
212.19.198.1/24
212.19.192.2/24
194.109.86.6 194.109.86.5