R3303-HP HSR6800 Routers IP Multicast Configuration Guide

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NOTE:
A
BGP MDT peer or peer
g
roup is a peer or peer
g
roup created in BGP-MDT subaddress family view.
Configuring a BGP MDT route reflector
BGP MDT peers in the same AS must be fully meshed to maintain connectivity. However, when many BGP
MDT peers exist in an AS, connection establishment among them might cause great expenses. To reduce
connections between them, you can configure one of them as a route reflector and specify other routers
as clients. The clients establish BGP MDT connections with the route reflector, and the route reflector
forwards (reflects) BGP MDT routing information between clients. In this way, the clients need not to be
fully meshed. Furthermore, you can disable client-to-client reflection to reduce overloads if the clients
have been fully meshed.
The route reflector and its clients form a cluster. In general, a cluster has only one route reflector whose
router ID identifies the cluster. However, you can configure several route reflectors in a cluster to improve
network reliability, and they must have the same cluster ID configured to avoid routing loops.
To configure a BGP MDT route reflector:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter BGP view.
bgp as-number N/A
3. Enter BGP MDT sub-address
family view.
ipv4-family mdt N/A
4. Configure the local device as
a route reflector and specify
its clients.
peer { group-name | ip-address }
reflect-client
By default, neither route reflectors
nor clients exist.
5. Disable route reflection
between clients.
undo reflect between-clients
Optional.
Enabled by default.
6. Configure the cluster ID of the
route reflector.
reflector cluster-id { cluster-id |
ip-address }
Optional.
By default, a route reflector uses its
router ID as the cluster ID.
Specifying the source IP address for multicast across
VPNs
To implement multicast across VPNs, you must specify the source IP address for multicast across VPNs.
Configuration prerequisites
Before you perform this configuration, complete the following tasks:
• Configure the RD in all VPN instances on the PEs and enable IP multicast routing.
• Create a VPN instance on each PE and specify the share-group.