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BGP and BGP4+ Configuration
Software Reference Supplement for SwitchBlade® x8112, x908, x900 and x610 Series Switches
2.6 AlliedWare Plus
TM
Operating System - Software Version 5.4.3-2.6 C613-50032-01 REV D
Configuring a BGP Route Reflector
Use a BGP Route Reflector to reduce the iBGP mesh inside an AS. In this example, Peer 2,
Peer 5 and Peer 4 would have to maintain a full mesh among themselves but by making
Peer 5 the Route Reflector, Peer 2 (Client1) has an iBGP session with the Route Reflector
only and not with Peer 4 (Client 2).
The routes learned from Peer 2 are advertised to the other clients and to iBGP peers
outside the cluster; the iBGP routes learned from iBGP peers outside the cluster are
advertised to Peer 2. This reduces the iBGP peer connections in AS1.
Route Reflector (Peer 5)
bgp_4
Peer 2
10.10.10.50
Peer 5
10.10.11.10
AS1
RR Client 1
Peer 3
Peer 1
Peer 4
10.10.11.50
10.10.10.10
Peer 6
RR Client 2
Route Reflector
awplus#
configure terminal
Enter the Global Configuration mode.
awplus(config)#
router bgp 1
Define the BGP routing process. The number 1 specifies
the AS number of Peer 5.
awplus(config-router)#
neighbor 10.10.10.50 remote-as 1
Define BGP neighbors. 10.10.10.50 is the IP address
of one of the neighbors (Peer 2) and 1 is the neighbor’s
AS number.
awplus(config-router)#
neighbor 10.10.10.50 route-reflector
client
Configure Peer 5 as the Route-Reflector (RR) and
neighbor Peer 2 as its client.
awplus(config-router)#
neighbor 10.10.11.50 remote-as 1
Define BGP neighbor. 10.10.11.50 is the IP address of
one of the neighbors (Peer 4) and 1 is the neighbor’s AS
number.