3Com 7757 Configuration Manual page 367

Configuring BGP RR
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Configuring BGP
Confederation
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Table 303 Configure BGP RR
Operation
Enter system view
Enable BGP, and enter BGP view
Configure the local router as the RR
and configure the peer group as the
client of the RR
Enable route reflection between
clients
Configure cluster ID of an RR
CAUTION:
Normally, full connection is not required between an RR and a client. A route is
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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
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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.
Table 304 Configure BGP confederation
Operation
Enter system view
Enable BGP, and enter BGP view
Basic BGP Configure
confederation confederation ID
configuration
Specify the
sub-ASs
included in a
confederation
Configure the compatibility of a
confederation
CAUTION:
A confederation can include up to 32 sub-ASs. The AS number used by a
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sub-AS which is configured to belong to a confederation is only valid inside the
confederation.
Configuring a Large-Scale BGP Network
Command Description
system-view -
bgp as-number Required
By default, the system does not
operate BGP.
peer group-name Required
reflect-client
By default, no RR and its client
is configured.
reflect Optional
between-clients
By default, route reflection is
enabled between clients.
reflector cluster-id Optional
cluster-id
By default, an RR uses its own
router ID as the cluster ID.
Command Description
system-view -
bgp as-number Required
By default, the system does not
operate BGP.
confederation id Required
as-number
By default, no confederation ID
confederation is configured and no sub-AS is
peer-as as-number-list configured for a confederation.
confederation Optional
nonstandard
By default, the confederation
configured is consistent with
the RFC1965.
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