mpls ldp timer keepalive-hold
Function
The mpls ldp timer keepalive-hold command sets the timeout period of a Keepalive hold timer.
The undo mpls ldp timer keepalive-hold command restores the default configuration.
By default, the timeout period of the Keepalive-hold timers of both local and remote sessions is 45 seconds.
Parameters
| Parameter | Description | Value |
|---|---|---|
| interval | Specifies the timeout period of a Keepalive hold timer. | An integer ranging from 30 to 65535, in seconds |
Views
Ethernet interface view, Ethernet sub-interface view, Eth-Trunk interface view, Eth-Trunk sub-interface view, Tunnel interface view, Dialer interface view, VLANIF interface view, Virtual-Template interface view
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.
Using 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 a remote LDP session from flapping.
Keepalive hold timer of the local session: used to maintain the local LDP session. The mpls ldp timer keepalive-hold command in the interface view sets a value for the timer.
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.
Implementation Procedure
When the mpls ldp timer keepalive-hold command is run, the system displays the following prompt:
Warning: All the related sessions will be deleted if the operation is performed! Continue? (y/n):y
To continue the operation, enter y.
Configuration Impact
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.
Precautions
If there is more than one LDP link 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.
Example
# Set the Keepalive hold timer for a local session to 90 seconds.
<sysname> system-view
[sysname] interface GigabitEthernet 0/0/0
[sysname-GigabitEthernet0/0/0] mpls ldp timer keepalive-hold 90
Warning: All the related sessions will be deleted if the operation is performed!
Continue? (y/n)y
[sysname-GigabitEthernet0/0/0] quit