rpf-frr

Function

The rpf-frr command enables PIM FRR.

The undo rpf-frr command disables PIM FRR.

By default, PIM FRR is disabled.

Format

rpf-frr

rpf-frr policy { acl-name acl-name | acl-number }

undo rpf-frr

Parameters

Parameter	Description	Value
policy	Configure a policy which uses ACL rules to specify the routing table entries that the FRR function takes effect on.	-
acl-name acl-name	Specifies an ACL by its name.	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).
acl-number	Specifies an ACL by its number.	The value is an integer ranging from 2000 to 3999.

Parameter

Description

Value

policy

Configure a policy which uses ACL rules to specify the routing table entries that the FRR function takes effect on.

acl-name acl-name

Specifies an ACL by its name.

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).

acl-number

Specifies an ACL by its number.

The value is an integer ranging from 2000 to 3999.

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

If a multicast link fails, services are interrupted before unicast routes are converged. Route convergence generally takes a long time, which is unacceptable by multicast services that have high requirements on real-time data transmission. To resolve this problem, configure PIM FRR. After PIM FRR is configured, PIM sets up primary and backup MDTs based on unicast backup FRR routes, allowing multicast traffic transmission through both the primary and backup links. The device's forwarding plane permits the multicast traffic on the primary link and discards that on the backup link. However, the forwarding plane permits the multicast traffic on the backup link immediately after the primary link fails, thus minimizing traffic loss.

You can specify an ACL to enable PIM FRR for the specified entry.

Precautions

The rpf-frr command conflicts with the multicast load-splitting { balance-ucmp | stable-preferred } command. The two commands cannot be both configured in the same view.

If any installed board does not support PIM FRR, the rpf-frr command cannot be executed in the PIM view.

If PIM FRR has been enabled on a device, a newly installed board fails to be registered if the board does not support PIM FRR.

If the rpf-frr command is run more than once, the latest configuration overrides the previous one.

Example

# Enable PIM FRR for a specified multicast routing entry in the public network instance.

<HUAWEI> system-view
[~HUAWEI] acl name frracl
[*HUAWEI-acl4-advance-frracl] rule permit ip source 10.0.0.1 0 destination 226.0.0.1 0
[*HUAWEI-acl4-advance-frracl] commit
[~HUAWEI-acl4-advance-frracl] quit
[~HUAWEI] multicast routing-enable
[~HUAWEI] pim
[*HUAWEI-pim] rpf-frr policy acl-name frracl

# Enable PIM FRR for the public network instance.

<HUAWEI> system-view
[~HUAWEI] multicast routing-enable
[*HUAWEI] pim
[*HUAWEI-pim] rpf-frr