peer minimum-ttl

Function

The peer minimum-ttl command sets a TTL threshold for multicast data packets that can be encapsulated in source active (SA) messages and forwarded to a specified Multicast Source Discovery Protocol (MSDP) peer.

The undo peer minimum-ttl command restores the default value.

By default, the TTL threshold is 0 for multicast data packets that can be encapsulated in SA messages and forwarded to an MSDP peer.

Format

peer peer-address minimum-ttl ttl

undo peer peer-address minimum-ttl

Parameters

Parameter	Description	Value
peer-address	Specifies the address of an MSDP peer.	The value is in dotted decimal notation.
ttl	Specifies a TTL threshold.	The value is an integer ranging from 0 to 255.

Parameter

Description

Value

peer-address

Specifies the address of an MSDP peer.

The value is in dotted decimal notation.

ttl

Specifies a TTL threshold.

The value is an integer ranging from 0 to 255.

Views

VPN instance MSDP view, MSDP view of a public network instance

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
msdp	write

Usage Guidelines

Usage Scenario

MSDP peers exchange SA messages over TCP connections. To limit multicast data packets that can be encapsulated in SA messages, run the peer minimum-ttl command to set a TTL threshold for multicast data packets.

After a TTL threshold is set for a specified MSDP peer, the Router checks the TTL of a multicast data packet before encapsulating the multicast data packet in an SA message. Only the multicast data packet with the TTL being greater than the threshold is encapsulated in an SA message and sent to the peer of the Router.

Prerequisites

The multicast routing function has been enabled using the multicast routing-enable command in the public network instance view or VPN instance view.

MSDP peers have been configured.

Example

# In the public network instance, set the TTL threshold to 10 for multicast data packets that can be encapsulated in SA messages and forwarded to the MSDP peer 10.10.10.1, so that only multicast data packets with the TTL value being greater than 10 can be encapsulated in SA messages and forwarded to the MSDP peer.

<HUAWEI> system-view
[~HUAWEI] interface loopback1
[*HUAWEI-LoopBack1] quit
[*HUAWEI] multicast routing-enable
[*HUAWEI] msdp
[*HUAWEI-msdp] peer 10.10.10.1 connect-interface LoopBack 1
[*HUAWEI-msdp] peer 10.10.10.1 minimum-ttl 10