Configuring Msdp Peer Connection Control; Configuring Sa Messages Related Parameters; Configuration Prerequisites; Configuring Sa Message Content - HP 4800G Series Configuration Manual

Configuring MSDP Peer Connection Control

MSDP peers are interconnected over TCP (port number 639). You can flexibly control sessions
between MSDP peers by manually deactivating and reactivating the MSDP peering 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, but the
configuration information will remain unchanged.
When a new MSDP peer is created, or when a previously deactivated MSDP peer connection is
reactivated, or when a previously failed MSDP peer attempts to resume operation, a TCP connection is
required. You can flexibly adjust the interval between MSDP peering connection retries.
Follow these steps to configure MSDP peer connection control:
To do...
Enter system view
Enter MSDP view
Deactivate an MSDP peer
Configure the interval between
MSDP peer connection retries

Configuring SA Messages Related Parameters

Configuration Prerequisites

Before configuring SA message delivery, complete the following tasks:
Configure any unicast routing protocol so that all devices in the domain are interoperable at the
network layer.
Configuring basic functions of MSDP
Before configuring SA message delivery, prepare the following data:
ACL rules for filtering SA request messages
ACL rules as SA message creation rules
ACL rules for filtering SA messages to be received and forwarded
TTL threshold for multicast packet encapsulation in SA messages
Maximum number of (S, G) entries learned from the specified MSDP peer that the router can cache

Configuring SA Message Content

Some multicast sources send multicast data at an interval longer than the aging time of (S, G) entries. In
this case, the source-side DR has to encapsulate multicast data packet by packet in register messages
and send them to the source-side RP. The source-side RP transmits the (S, G) information to the
remote RP through SA messages. Then the remote RP joins the source-side DR and builds an SPT.
Since the (S, G) entries have timed out, remote receivers can never receive the multicast data from the
multicast source.
If the source-side RP is enabled to encapsulate register messages in SA messages, when there is a
multicast packet to deliver, the source-side RP encapsulates a register message containing the
multicast packet in an SA message and sends it out. After receiving the SA message, the remote RP
Use the command...
system-view
msdp
shutdown peer-address
timer retry interval
1-11
Remarks
—
—
Optional
Active by default
Optional
30 seconds by default