3Com Switch 7750 Configuration Guide

Configuring a Large-Scale BGP Network 367
Configuring BGP RR
c
CAUTION:
■ Normally, full connection is not required between an RR and a client. A route is
reflected by an RR from a client to another client. If an RR and a client are fully
connected, you can disable the reflection between clients to reduce the cost.
■ Normally, there is only one RR in a cluster. In this case, the router ID of the RR is
used to identify the cluster. Configuring multiple RRs can improve the network
stability. If there are multiple RRs in a cluster, use related command to configure
the same cluster ID for them to avoid routing loops.
Configuring BGP
Confederation
c
CAUTION:
■ A confederation can include up to 32 sub-ASs. The AS number used by a
sub-AS which is configured to belong to a confederation is only valid inside the
confederation.
Table 303 Configure BGP RR
Operation Command Description
Enter system view system-view -
Enable BGP, and enter BGP view bgp as-number Required
By default, the system does not
operate BGP.
Configure the local router as the RR
and configure the peer group as the
client of the RR
peer group-name
reflect-client
Required
By default, no RR and its client
is configured.
Enable route reflection between
clients
reflect
between-clients
Optional
By default, route reflection is
enabled between clients.
Configure cluster ID of an RR reflector cluster-id
cluster-id
Optional
By default, an RR uses its own
router ID as the cluster ID.
Table 304 Configure BGP confederation
Operation Command Description
Enter system view system-view -
Enable BGP, and enter BGP view bgp as-number Required
By default, the system does not
operate BGP.
Basic BGP
confederation
configuration
Configure
confederation ID
confederation id
as-number
Required
By default, no confederation ID
is configured and no sub-AS is
configured for a confederation.
Specify the
sub-ASs
included in a
confederation
confederation
peer-as as-number-list
Configure the compatibility of a
confederation
confederation
nonstandard
Optional
By default, the confederation
configured is consistent with
the RFC1965.