PurposeCommand or Action
Places the router in neighbor configuration mode for BGP
routing and configures the neighbor IP address as a BGP
peer.
neighbor ip-address
Example:
RP/0/RSP0/CPU0:router(config-bgp)# neighbor
172.168.40.24
Step 11
(Optional) Specifies that the BGP neighbor inherit
configuration from the specified neighbor group.
use neighbor-group group-name
Example:
RP/0/RSP0/CPU0:router(config-bgp-nbr)# use
neighbor-group nbr-grp-A
Step 12
Creates a neighbor and assigns a remote autonomous system
number to it.
remote-as as-number
Example:
RP/0/RSP0/CPU0:router(config-bgp-nbr)#
remote-as 2002
Step 13
commit
Step 14
Configuring a Route Reflector for BGP
Perform this task to configure a route reflector for BGP.
All the neighbors configured with the route-reflector-clientcommand are members of the client group, and
the remaining iBGP peers are members of the nonclient group for the local route reflector.
Together, a route reflector and its clients form a cluster. A cluster of clients usually has a single route reflector.
In such instances, the cluster is identified by the software as the router ID of the route reflector. To increase
redundancy and avoid a single point of failure in the network, a cluster can have more than one route reflector.
If it does, all route reflectors in the cluster must be configured with the same 4-byte cluster ID so that a route
reflector can recognize updates from route reflectors in the same cluster. The bgp cluster-id command is used
to configure the cluster ID when the cluster has more than one route reflector.
SUMMARY STEPS
1.
configure
2.
router bgp as-number
3.
bgp cluster-id cluster-id
4.
neighbor ip-address
5.
remote-as as-number
6.
address-family { ipv4 | ipv6 } unicast
7.
route-reflector-client
8.
commit
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
OL-30423-03 99
Implementing BGP
Configuring a Route Reflector for BGP
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