Motorola BSR 2000, Configuration And Management Manual

Page: 530 / 650

BSR 2000 Configuration and Management Guide Release 1.0
12-12 MGBI 526360-001-00 Rev. B
Configuring a Routing Domain Confederation
You can reduce the IBGP mesh inside an AS by creating a BGP confederation. In
Figure 12-5 , AS 400 consists of ten BGP neighbors that, without confederations,
require that the routers be fully meshed. Each of the ten routers run IBGP with the
other nine routers and connect to an external AS. Using a confederation, you reduce
the number of peers required with AS 400. Each AS within AS 400 (AS 100, AS 200,
and AS 300) must be fully meshed and IBGP run between its members. ASs outside
AS 400 recognize the confederation as one AS, that is, AS 400.