Configuring A Bgp Route Reflector - 3Com S7906E Configuration Manual

Advertise the
community
attribute to a
peer/peer group
Apply a routing policy to routes advertised
to a peer/peer group

Configuring a BGP Route Reflector

If an AS has many BGP routers, you can configure them as a cluster and configure one of them as a
route reflector and others as clients to reduce iBGP connections.
To enhance network reliability and prevent single point failures, you can specify multiple route reflectors
for a cluster. The route reflectors in the cluster must have the same cluster ID specified to avoid routing
loops.
Follow these steps to configure a BGP route reflector:
To do...
Enter system view
Enter BGP view
Configure the router as a route
reflector and specify a
peer/peer group as its client
Enable route reflection
between clients
Configure the cluster ID of the
route reflector
In general, it is not required to make clients of a route reflector fully meshed. The route reflector
forwards routing information between clients. If clients are fully meshed, you can disable route
reflection between clients to reduce routing costs.
In general, a cluster has only one route reflector, and the router ID is used to identify the cluster.
You can configure multiple route reflectors to improve network stability. In this case, you need to
specify the same cluster ID for these route reflectors using the reflector cluster-id command to
avoid routing loops.
To do...
Advertise the
community attribute to
a peer/peer group
Advertise the
extended community
attribute to a peer/peer
group
Use the command...
system-view
bgp as-number
peer { group-name |
ip-address } reflect-client
reflect between-clients
reflector cluster-id cluster-id
Use the command...
peer { group-name | ip-address }
advertise-community
peer { group-name | ip-address }
advertise-ext-community
peer { group-name | ip-address }
route-policy route-policy-name
export
1-40
Remarks
Required
Not configured
by default.
Required
Not configured
by default.
Remarks
—
—
Required
Not configured by default.
Optional
Enabled by default
Optional
By default, a route reflector
uses its router ID as the cluster
ID.