R3303-HP 6600/HSR6600 Routers Layer 3 - IP Routing Configuration Guide

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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.
To configure a BGP route reflector:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enter BGP view or BGP-VPN
instance view.
• Enter BGP view:
bgp as-number
• Enter BGP-VPN instance view:
a. bgp as-number
b. ipv4-family vpn-instance
vpn-instance-name
Use either method.
3. Configure the router as a route
reflector and specify a peer or
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.
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. For more information, see "Enabling BGP."