rpf-prune-delay

Function

The rpf-prune-delay command sets a delay in sending Prune messages to upstream devices, so that Prune messages are not sent immediately when a PIM-SM SPT or PIM-SSM route change occurs.

The undo rpf-prune-delay command restores the default configuration.

By default, no delay is set in sending Prune messages to upstream devices.

Format

rpf-prune-delay delay-time [ policy { acl-number | acl-name acl-name } ]

undo rpf-prune-delay [ delay-time [ policy { acl-number | acl-name acl-name } ] ]

Parameters

Parameter	Description	Value
delay-time	Sets a delay in sending Prune messages to upstream devices.	The value is an integer ranging from 1 to 300, in seconds.
policy	Indicates a matching policy for multicast entries to be pruned.	-
acl-number	Specifies an ACL number.	The value is an integer ranging from 2000 to 3999.
acl-name acl-name	Specifies an ACL number.	The value is a string of 1 to 64 case-sensitive characters without spaces. The value must start with a letter (a to z or A to Z, case sensitive).

Views

VPN instance PIM view, PIM view of a public network instance

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
pim	write

Usage Guidelines

Usage Scenario

In IGP ECMP-based or non-ECMP-based PIM FRR scenarios, IGP route changes will trigger frequent PIM inbound interface switchovers, causing frequent master/backup forwarding entry switchovers on the forwarding plane. As a result, the rapid convergence function of PIM FRR is adversely affected. To resolve this issue, run the rpf-prune-delay command to set a delay in sending Prune messages to upstream devices.

Configuration Impact

If the rpf-prune-delay command is run for more than one, the latest configuration overrides the previous one.

Example

# Set the delay in sending Prune messages to upstream devices to 210s.

<HUAWEI> system-view
[~HUAWEI] multicast routing-enable
[*HUAWEI] pim
[~HUAWEI-pim] rpf-prune-delay 210