H3C Technologies H3C SR8800 - Manual (Page 250)

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Step Command Remarks
3. Configure the router as a route
reflector and specify a
peer/peer group as its client.
peer { group-name | ip-address }
reflect-client
Not configured by default.
The peer reflect-client command
can be configured in both BGP
view and BGP-VPNv4 subaddress
family view. In BGP view, the
command enables the router to
reflect routes of the public network;
in BGP-VPNv4 subaddress family
view, the command enables the
router to reflect routes of the private
network. (You can enter
BGP-VPNv4 subaddress family
view by executing the ipv4-family
vpnv4 command in BGP view. For
more information about the
ipv4-family vpnv4 command, see
MPLS Command Reference.)
4. Enable route reflection
between clients.
reflect between-clients
Optional.
Enabled by default.
5. Configure the cluster ID of the
route reflector.
reflector cluster-id cluster-id
Optional.
By default, a route reflector uses its
router ID as the cluster ID.
CAUTION:
•
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, 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. To avoid routing loops, specify the same
cluster ID for these route reflectors by using the reflector cluster-id command.
Configuring a BGP confederation
Configuring a BGP confederation is another way for reducing IBGP connections in an AS.
A confederation contains sub ASs. In each sub AS, IBGP peers are fully meshed. Between sub ASs, EBGP
connections are established.
If routers not compliant with RFC 3065 exist in the confederation, use the confederation nonstandard
command to make the local router compatible with these routers.
Configuring a BGP confederation
After you split an AS into multiple sub ASs, you can configure a router in a sub AS in the following way:
1. Enable BGP and specify the AS number of the router.
2. Specify the confederation ID. From an outsider’s perspective, the sub ASs of the confederation is
a single AS, which is identified by the confederation ID.
3. If the router needs to establish EBGP connections to other sub ASs, specify the peering sub ASs in
the confederation.