timer hello (IPv4)

Function

The timer hello command sets the interval at which the PIM switch sends Hello messages.

The undo timer hello command restores the default interval.

By default, the interval at which the PIM switch sends Hello messages is 30 seconds.

Format

timer hello interval

undo timer hello

Parameters

Parameter	Description	Value
interval	Specifies the interval at which Hello messages are sent.	The value is an integer ranging from 1 to 18000, in seconds.

Views

PIM view of public network instance or PIM view of VPN instance

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

PIM routers periodically send Hello messages to maintain PIM neighbor relationships. You can run the pim timer hello command to set the interval for sending Hello messages.

Prerequisites

IP multicast routing has been enabled using the multicast routing-enable command.

Configuration Impact

This command is valid for both PIM-DM and PIM-SM.

The interval at which the PIM switch sends Hello messages should be less than the timeout period of the PIM neighbor. You can run the hello-option holdtime (IPv4) command to set the timeout period of PIM neighbors.

The timer hello command has the same function as the pim timer hello command in the interface view. By default, if the pim timer hello command is not used, the value configured in the PIM view is used; otherwise, the value configured in the interface view is used.

Example

# Set the interval at which PIM Hello messages are sent to 40s in the PIM view of public network instance.

<HUAWEI> system-view
[HUAWEI] multicast routing-enable
[HUAWEI] pim
[HUAWEI-pim] timer hello 40