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Configuring Connection Between MSDP Peers 591
Configuring MSDP Basic
Functions
Configuring
Connection Between
MSDP Peers
An AS may contain multiple MSDP peers. To avoid SA flooding between the MSDP
peers, you can use the MSDP mesh mechanism to improve traffic. When multiple
MSDP peers are fully connected with one another, these MSDP peers form a mesh
group. When an MSDP peer in the mesh group receives SA messages from outside
the mesh group, it sends them to other members of the group. On the other hand, a
mesh group member does not perform RPF check on SA messages from within the
mesh group and does not forward the messages to other members of the mesh
group. This avoids SA message flooding since it is unnecessary to run BGP or MBGP
between MSDP peers, thus simplifying the RPF checking mechanism.
The sessions between MSDP peers can be terminated and reactivated sessions as
required. When a session between MSDP peers is terminated, the TCP connection is
closed, and there will be no reconnection attempts. However, the configuration
information is kept.
Configuration
Prerequisites
Before configuring an MSDP peer connection, you need to configure:
■ A unicast routing protocol
■ Basic functions of IP multicast
■ PIM-SM basic functions
■ MSDP basic functions
Table 644 Configure MSDP basic functions
Operation Command Description
Enter system view system-view -
Enable IP multicast routing multicast routing-enable Required
The multicast function must be
enabled before other multicast
configurations can take effect.
Enable MSDP function
and enter MSDP view
msdp Required
Enable the MSDP function.
Create an MSDP peer
connection
peer peer-address
connect-interface
interface-type
interface-number
Required
To establish an MSDP peer
connection, you must configure the
parameters on both peers. The peers
are identified by an address pair (the
address of the interface on the local
router and the IP address of the
remote MSDP peer).
Configure a static RPF
peer
static-rpf-peer peer-address [
rp-policy ip-prefix-name ]
Optional
For an area containing only one
MSDP peer, if the BGP or MBGP does
not run in this area, you need to
configure a static RPF peer.