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C H A P T E R 14 Border Gateway Protocol (BGP)
257
BGP Features
The BGP features supported by the 480T routing switch include:
• Route Reflectors
• Route Confederations
• Route Aggregation
• Route Map Support
• IGP Synchronization
• Loopback Interface
• OSPF-to-BGP Route Redistribution
• BGP Peer Groups
Route Reflectors
Be certain that peer
routers that are not part of
the cluster are fully
meshed according to the
rules of BGP.
One way to overcome the difficulties of creating a fully meshed AS
is to use route reflectors. Route reflectors allow a single router to
serve as a central routing point for the AS or sub-AS.
A cluster is formed by the route reflector and its client routers.
Figure 14.1 shows a BGP cluster, including the route reflector and
its clients.
Figure 14.1: Route reflectors
480T_042R
Client
Client
Route Reflector
Non-client
Cluster
3421
7865
11 12109
13 161514
87654321
161514131211109
Rx TxRx TxRx TxRx Tx
3421
7865
11 12109
13 161514
87654321
161514131211109
Rx TxRx TxRx TxRx Tx
3421
7865
11 12109
13 161514
87654321
161514131211109
Rx TxRx TxRx TxRx Tx
3421
7865
11 12109
13 161514
87654321
161514131211109
Rx TxRx TxRx TxRx Tx