Default Redistribution And Route Aggregation Example - Lenovo CN4093 Application Manual

Default Redistribution and Route Aggregation Example

1. Configure the IP interface.
2. Configure the AS number (AS 135) and router ID number (10.1.1.135)
3. Configure internal peer router 1 and external peer router 2.
4. Configure redistribution for Peer 1.
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CN4093 Application Guide for N/OS 8.3
This example shows you how to configure the switch to redistribute information
from one routing protocol to another and create an aggregate route entry in the
BGP routing table to minimize the size of the routing table.
As illustrated in Figure
peer router. Configure the CN4093 to redistribute the default routes from AS 200 to
AS 135. At the same time, configure for route aggregation to allow you to condense
the number of routes traversing from AS 135 to AS 200.
Figure 46. Route Aggregation and Default Route Redistribution
AS 135
Internal peer router 1
10.1.1.4
135.110.0.0/16
135.120.0.0/16
CN 4093(config)# router bgp
CN 4093(config-router-bgp)# as 135
CN 4093(config-router-bgp)# exit
CN 4093(config)# ip router-id 10.1.1.135
CN 4093(config)# router bgp
CN 4093(config-router-bgp)# neighbor 1 remote-address 10.1.1.4
CN 4093(config-router-bgp)# neighbor 1 remote-as 135
CN 4093(config-router-bgp)# no neighbor 1 shutdown
CN 4093(config-router-bgp)# neighbor 2 remote-address 20.20.20.2
CN 4093(config-router-bgp)# neighbor 2 remote-as 200
CN 4093(config-router-bgp)# no neighbor 2 shutdown
CN 4093(config-router-bgp)# neighbor 1 redistribute default-action
redistribute
CN 4093(config-router-bgp)# neighbor 1 redistribute fixed
46, you have two peer routers: an internal and an external
Aggregate routes 135.0.0.0/8
traversing from
AS 135 to AS 200
20.20.20.135
GbE
Switch Module
10.1.1.135
0.0.0.0/0
Default routes towards
internal peer router
AS 200
External peer router 2
20.20.20.2
.