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BGP Peer Groups

The International Travel Agency peers with ISP1A in AS 200 and ISP2 in AS 300. The company applies similar policies to both neighbors. Rather than configuring policies separately for each neighbor, you decide to configure a BGP peer group. | 9.7.3 BGP Peer Groups 1-0-0 1 8 3.0.0.1 8 AS 200 AS 300 Objective In this lab you use BGP peer groups to simplify your configuration tasks. Scenario The International Travel Agency peers with ISP1A in AS 200 and ISP2 in AS 300. The company applies similar policies to both neighbors. Rather than configuring policies separately for each neighbor you decide to configure a BGP peer group. Step 1 Build and configure the network according to the diagram but do not configure a routing protocol yet. Configure a loopback interface with an IP address for each ISP router as shown. These loopbacks will simulate networks that reside within each AS. Use ping to test connectivity between all directly connected interfaces. Step 2 Configure ISP1A and ISP2 for EBGP. ISP1A s configuration is shown here as an example ISP1A config router bgp 200 ISP1A config-router neighbor 192.168.1.6 remote-as 100 ISP1A config-router network 1.0.0.0 1 - 2 Semester 5 Advanced Routing v2.0 - Lab 9.7.3 Copyright 2001 Cisco Systems Inc. Step 3 Use a peer group to configure SanJose3 so that it will apply policies jointly to both ISP1A and ISP2 SanJose3 SanJose3 SanJose3 SanJose3 SanJose3 SanJose3 SanJose3 SanJose3 SanJose3 SanJose3 SanJose3 SanJose3 SanJose3 config router bgp 100 config-router network 2.0.0.0 config-router neighbor config-router neighbor config-router neighbor config-router neighbor config-router neighbor config-router neighbor config-router neighbor config-router exit config route-map EXTERNAL 10 config-route-map set community 40 config-route-map exit EBGP-PEERS peer-group EBGP-PEERS send-community EBGP-PEERS route-map EXTERNAL out 192.168.1.5 172.24.1.18 192.168.1.5 172.24.1.18 remote-as 200 remote-as 300 peer-group EBGP-PEERS peer-group EBGP-PEERS Because SanJose3 s neighbors have been assigned a peer group in this case a group called EBGP-PEERS configurations need to be applied only once to the group itself. The more routers that are added to the peer group the more time you will save