Motorola BSR 2000, Configuration And Management Manual

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Release 1.0 Configuring BGP
526360-001-00 Rev. B MGBI 12-13
Although the peers in different ASs within the same confederation have EBGP
sessions, they exchange routing information as if they were IBGP peers. Specifically,
the next-hop and local preference information is preserved. This lets you retain a
single IGP for all the ASs in the confederation. To the outside, the confederation looks
like a single AS.
Figure 12-5 Configuring a Routing Domain Confederation
1. Use the bgp confederation identifier command in Router Configuration mode to
specify a BGP confederation identifier:
AS 100
AS 400
AS 500
Salem
7.7.7.2
7.7.7.1
AS 600
Providence
6.6.6.6
Boston
Concord
Hartford
140.100.40.1
160.21.10.1
Denver
Chicago
Seattle
SF
San Diego
Portland
Houston
139.100.20.1
139.100.30.1
140.100.30.1
140.100.20.1
AS 200 AS 300