Configuring An Msdp Mesh Group; Controlling Msdp Peering Connections - HP MSR2003 Configuration Manual

To describe an MSDP peer:
Step
1. Enter system view.
2. Enter MSDP view.
3. Configure the description for
an MSDP peer.

Configuring an MSDP mesh group

An AS might contain multiple MSDP peers. You can use the MSDP mesh group mechanism to avoid SA
message flooding among these MSDP peers and to optimize the multicast traffic.
In an MSDP mesh group, member MSDP peers forward SA messages that passed the RPF check from
outside the mesh group to the other members in the mesh group. If a mesh group member receives an SA
message from another member, it neither performs an RPF check on the message nor forwards the
message to the other members.
This mechanism not only avoids SA message flooding but also simplifies the RPF check mechanism
because you do not need to run BGP or MBGP between these MSDP peers.
To organize multiple MSDP peers in a mesh group, assign the same mesh group name to these MSDP
peers. Before doing this, make sure the routers are interconnected with one another.
To create an MSDP mesh group:
Step
1. Enter system view.
2. Enter MSDP view.
3. Assign an MSDP peer to the
mesh group.

Controlling MSDP peering connections

MSDP peers are interconnected over TCP (port number 639). You can tear down or re-establish MSDP
peering connections to control SA message exchange between the MSDP peers. When the connection
between two MSDP peers is torn down, SA messages are no longer delivered between them, and the
TCP connection is closed without any connection setup attempt. The configuration information, however,
remains unchanged.
MSDP peers periodically send keepalive messages to each other to keep a session alive. When a session
is established, an MSDP peer sends a keepalive message to its peer and starts a keepalive timer and a
peer hold timer. When the keepalive timer expires, the MSDP peer sends a new keepalive message. If
the MSDP peer receives an MSDP message from its peer before the peer hold timer expires, it resets the
peer hold timer. Otherwise, the MSDP peer tears down the session.
Command
system-view
msdp [ vpn-instance
vpn-instance-name ]
peer peer-address description text
Command
system-view
msdp [ vpn-instance
vpn-instance-name ]
peer peer-address mesh-group
name
146
Remarks
N/A
N/A
By default, no description is
configured for an MSDP peer.
Remarks
N/A
N/A
By default, an MSDP peer does not
belong to any mesh group.
If you assign an MSDP peer to
multiple mesh groups, the most
recent configuration takes effect.