mpls ldp timer keepalive-hold

Function

The mpls ldp timer keepalive-hold command sets the value of a Keepalive hold timer.

The undo mpls ldp timer keepalive-hold command restores the default setting.

By default, the value of the Keepalive-hold timers of both local and remote sessions is 45 seconds.

Format

mpls ldp timer keepalive-hold interval

undo mpls ldp timer keepalive-hold

Parameters

Parameter	Description	Value
interval	Specifies the timeout period of a Keepalive hold timer.	The value is an integer ranging from 30 to 65535, in seconds.

Views

VLANIF interface view, GE interface view, XGE interface view, MultiGE interface view, 25GE interface view, 40GE interface view, 100GE interface view, Eth-trunk interface view, remote MPLS LDP peer view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

LDP peers exchange LDP PDUs over session connections to maintain LDP sessions. If a node does not receive any LDP PDU after the Keepalive hold timer expires, the node closes the connection to terminate the session.

The default value of the Keepalive hold timer is recommended. On a network with unstable links, increase the value of a Keepalive hold timer, preventing the session flapping.

Keepalive hold timers are classified into the following types:

Keepalive hold timer of the local session: maintains the local LDP session. The mpls ldp timer keepalive-hold command in the interface view sets a value of the timer.
Keepalive hold timer of the remote session: maintains the remote LDP session. The mpls ldp timer keepalive-hold command in the remote MPLS LDP peer view sets a value of the timer.

Prerequisites

The remote LDP peer has been configured or MPLS LDP has been enabled on the interface.

Precautions

The value of the Keepalive hold timer that takes effect is the smaller one between the two Keepalive hold timers configured on both ends of an LDP session.
If more than one LDP link exists between two LSRs, the values of the Keepalive hold timers set for the links must be the same; otherwise, the LDP sessions may be unstable.
Changing the value of a Keepalive hold timer causes the reestablishment of related LDP sessions.

Example

# Set the value of the Keepalive hold timer for a local session to 60 seconds.

<HUAWEI> system-view
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] mpls ldp
[HUAWEI-Vlanif100] mpls ldp timer keepalive-hold 60
Warning: All the related sessions will be deleted if the operation is performed!Continue? (y/n)y

# Set the value of the Keepalive hold timer for a local session to 60 seconds.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] mpls ldp
[HUAWEI-GigabitEthernet0/0/1] mpls ldp timer keepalive-hold 60
Warning: All the related sessions will be deleted if the operation is performed!Continue? (y/n)y

# Set the value of the Keepalive hold timer for a remote session to 50 seconds.

<HUAWEI> system-view
[HUAWEI] mpls ldp remote-peer bji
[HUAWEI-mpls-ldp-remote-bji] mpls ldp timer keepalive-hold 50
Warning: All the related sessions will be deleted if the operation is performed!Continue? (y/n)y