Configuring An Msdp Mesh Group; Configuring Msdp Peer Connection Control - HP A5500 SI Switch Series Configuration Manual

To do...
Enter system view
Enter public network MSDP view
or VPN instance MSDP view
Configure description for an
MSDP peer

Configuring an MSDP mesh group

An AS can contain multiple MSDP peers. You can use the MSDP mesh group mechanism to avoid SA
message flooding among these MSDP peers and optimize the multicast traffic.
An MSDP peer in an MSDP mesh group forwards SA messages from outside the mesh group that have
passed the RPF check to the other members in the mesh group. A mesh group member accepts SA
messages from inside the group without performing an RPF check, and does not forward the message
within the mesh group. This mechanism not only avoids SA flooding but also simplifies the RPF check
mechanism because you do not need to run BGP or MBGP between these MSDP peers.
By configuring the same mesh group name for multiple MSDP peers, you can create a mesh group that
contains these MSDP peers.
Follow these steps to create an MSDP mesh group:
To do...
Enter system view
Enter public network MSDP view
or VPN instance MSDP view
Create an MSDP mesh group and
assign an MSDP peer to that
mesh group
NOTE:
Before grouping multiple routers into an MSDP mesh group, make sure that these routers are
interconnected with one another.
If you configure more than one mesh group name on an MSDP peer, only the last configuration is
effective.

Configuring MSDP peer connection control

MSDP peers are interconnected over TCP with port number 639. You can control the sessions between
MSDP peers by deactivating and reactivating the MSDP peer connections. When the connection
between two MSDP peers is deactivated, SA messages will no longer be delivered between them, and
the TCP connection is closed without any connection setup retry. The configuration information, however,
remains unchanged.
A TCP connection is required in the following situations:
When you create a new MSDP peer
•
Use the command...
system-view
msdp [ vpn-instance vpn-instance-
name ]
peer peer-address description text
Use the command...
system-view
msdp [ vpn-instance vpn-instance-
name ]
peer peer-address mesh-group
name
198
Remarks
—
—
Required
No description for MSDP peers
by default
Remarks
—
—
Required
An MSDP peer does not belong to
any mesh group by default