R3721-F3210-F3171-HP High-End Firewalls Network Management Configuration Guide-6PW101

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To configure a BGP route reflector:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter BGP view. bgp as-number N/A
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.
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.
1. Configure 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:
{ Enable BGP and specify the AS number of the router.
{ 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.
{ If the router needs to establish EBGP connections to other sub ASs, you need to specify the
peering sub ASs in the confederation.
A confederation contains 32 sub ASs at most. The AS number of a sub AS is effective only in the
confederation.
To configure a BGP confederation:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter BGP view.
bgp as-number N/A