H3C Technologies H3C SecPath F1000-E - Manual (Page 496)

471
Step Command Remarks
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:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter BGP view. bgp as-number N/A
3. Configure a confederation ID. confederation id as-number Not configured by default.
4. Specify peering sub ASs in the
confederation.
confederation peer-as as-number-list Not configured by default.
2. Configure confederation compatibility.
If some other routers in the confederation do not comply with RFC 3065, you need to enable
confederation compatibility to allow the router to work with those routers.