graceful-restart period (IPv4)

Function

The graceful-restart period command configures the minimum PIM GR period.

The undo graceful-restart period command restores the default minimum PIM GR period.

By default, the minimum PIM GR period is 120 seconds.

Format

graceful-restart period period

undo graceful-restart period

Parameters

Parameter	Description	Value
period	Specifies the minimum PIM GR period.	The value is an integer that ranges from 90 to 3600 in seconds.

Views

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

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The graceful-restart period command ensures the minimum time for maintaining forwarding entries.

Prerequisites

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

Configuration Impact

If you run the graceful-restart period command multiple times, only the latest configuration takes effect.

Precautions

Unicast protocol GR form the basis of PIM GR; therefore, the minimum PIM GR period must be longer than the unicast protocol GR period.

The PIM GR period also depends on the complexity of the network topology and increases with the expansion of unicast route capacity and multicast route capacity.

Example

# Set the minimum PIM GR period in the PIM view of public network instance to 150 seconds.

<HUAWEI> system-view
[HUAWEI] multicast routing-enable
[HUAWEI] pim
[HUAWEI-pim] graceful-restart
[HUAWEI-pim] graceful-restart period 150