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ManualsBrandsMotorola ManualsComputer equipmentBSR 64000
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BSR 64000 Configuration and Management Guide
12-12
name is the name you assign to the peer group.
Examples
The commands in the following example configure a BGP peer group on Router
Chicago and apply it to Routers San Francisco, Dallas, and Seattle (as shown in
Figure 12-4):
MOT(config)#router bgp 100
MOT(config-bgp)#neighbor PACIFIC peer-group
MOT(config-bgp)#neighbor PACIFIC remote-as 100
MOT(config-bgp)#neighbor 2.2.2.2 peer-group PACIFIC
MOT(config-bgp)#neighbor 3.3.3.3 peer-group PACIFIC
MOT(config-bgp)#neighbor 4.4.4.4 peer-group PACIFIC
The commands in the following example configure a BGP peer group on Router
Chicago and apply it to Routers Philadelphia, Trenton, and Boston (as shown in
Figure 12-4):
MOT(config)#router bgp 100
MOT(config-bgp)#neighbor ATLANTIC peer-group
MOT(config-bgp)#neighbor 5.5.5.5 peer-group ATLANTIC
MOT(config-bgp)#neighbor 5.5.5.5 remote-as 200
MOT(config-bgp)#neighbor 6.6.6.6 peer-group ATLANTIC
MOT(config-bgp)#neighbor 6.6.6.6 remote-as 300
MOT(config-bgp)#neighbor 7.7.7.7 peer-group ATLANTIC
MOT(config-bgp)#neighbor 7.7.7.7 remote-as 400
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.
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.