tunnel timer hello

Function

The tunnel timer hello command sets the interval for sending Hello packets.

The undo tunnel timer hello command restores the default interval.

By default, Hello packets are sent every 60 seconds.

This command is supported only on the NetEngine 8000 F1A.

Format

tunnel timer hello interval-time

undo tunnel timer hello

Parameters

Parameter	Description	Value
interval-time	Specifies the interval for sending Hello packets. It is an integer in seconds.	The value is an integer that ranges from 0 to 100000.

Parameter

Description

Value

interval-time

Specifies the interval for sending Hello packets. It is an integer in seconds.

The value is an integer that ranges from 0 to 100000.

Views

L2TP group view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
l2tp	write

Usage Guidelines

Usage Scenario

To check connectivity of the tunnel between the LAC and LNS, the LAC and LNS send Hello packets to each other periodically and return responses when receiving the Hello packets.

If the LAC or LNS does not receive response to the Hello packet from the peer within a specified period, the LAC or LNS sends a Hello packet again. If the LAC or LNS does not receive the response from the peer for specified times, the LAC or LNS considers the L2TP tunnel disconnected and deletes all the sessions on the tunnel.

You can use the tunnel timer hello command to change the interval for sending Hello packets. LNS side and LAC side can be configured with different intervals.

Precautions

when a specified value is smaller than the default value 60, it may cause high CPU usage and overburden the system.

Example

# Set the interval for sending Hello packets to 10 seconds.

<HUAWEI> system-view
[~HUAWEI] l2tp-group 1
[*HUAWEI-l2tp-1] tunnel timer hello 10
Warning: The interval value is less than 60.This operation may cause high CPU usage and overburden the system .Continue? [Y/N]:

# Set the interval for sending Hello packets to 99 seconds.

<HUAWEI> system-view
[~HUAWEI] l2tp-group 1
[*HUAWEI-l2tp-1] tunnel timer hello 99