Configuring An Msdp Mesh Group; Controlling Msdp Peering Connections - HP FlexFabric 5950 series Configuration Manual

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

Configuring an MSDP mesh group

This feature avoids SA message flooding among MSDP peers within an AS. It also simplifies the
RPF check mechanism because you do not need to run BGP or MBGP between these MSDP peers.
When receiving an SA message from outside the mesh group, a member MSDP peer performs the
RPF check on the SA message. If the SA message passes the RPF check, the member MSDP peer
floods the message to the other members in the mesh group. When receiving an SA message from
another member, the MSDP peer neither performs an RPF check on the message nor forwards the
message to the other members.
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 configure an MSDP mesh group:
Step
1. Enter system view.
2. Enter MSDP view.
3. Configure an MSDP
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. No attempt is made to re-establish the connection. The configuration information for the peer
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.
A TCP connection is required when one of the following conditions exists:
•
A new MSDP peer is created.
•
A previously deactivated MSDP peering connection is reactivated.
•
A previously failed MSDP peer attempts to resume operation.
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
179
Remarks
N/A
N/A
By default, no description for
an MSDP peer exists.
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.