Motorola BSR 2000, Configuration And Management Manual

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BSR 2000 Configuration and Management Guide Release 1.0
12-4 MGBI 526360-001-00 Rev. B
You can configure BGP operating parameters manually. BGP selects among different
routes by comparing specific path attributes or metrics for each route. The local
administrator can configure each of these and assign them different values.
Figure 12-1 Advertising BGP Routes
BGP Peers
BGP provides a means for BGP peers, or neighbors, to exchange routing information
within an AS (IBGP) and with peers within other ASs (EBGP). Information is
exchanged between peers about the following:
■
New active routes and their attributes
■
Inactive routes
■
Unusual conditions that require connection termination
BGP does not require routing information to be refreshed. Advertised route
information is considered valid by its neighbors until the first router explicitly
advertises that the information is no longer valid or until the BGP session is lost.
AS 100
AS 200
LA
AS 300
Miami
bgp0003
Boston
NY
Dallas
IBGP
EBGP
EBGP
IBGP
1
2
EBGP
4
3
5