multicast hold-up

Function

The multicast hold-up command adjusts the hold-up period for a trunk member interface that changes from Down to Up to forward multicast traffic.

The undo multicast hold-up command restores the hold-up period to the default value for a trunk member interface that changes from Down to Up to forward multicast traffic.

The default value is 2 seconds.

Format

multicast hold-up hold-up-time

undo multicast hold-up hold-up-time

undo multicast hold-up

Parameters

Parameter	Description	Value
hold-up-time	Specifies the hold-up period for a trunk member interface that changes from Down to Up to forward multicast traffic.	The value is an integer ranging from 2 to 300, in seconds.The default value is 2.

Parameter

Description

Value

hold-up-time

Specifies the hold-up period for a trunk member interface that changes from Down to Up to forward multicast traffic.

The value is an integer ranging from 2 to 300, in seconds.The default value is 2.

Views

Layer 2 Eth-Trunk interface view, Eth-Trunk interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
forwarding	write

Usage Guidelines

Usage Scenario

When the outbound interface of multicast services is a trunk interface and the physical state of a trunk member interface changes from Down to Up, before multicast forwarding entries are delivered to this member interface, packet loss may occur during multicast forwarding. By default, multicast traffic is forwarded 2 seconds after the physical state of a trunk member interface changes from Down to Up. This ensures that no packet is lost during multicast forwarding. When the multicast traffic is heavy, it takes a longer time to deliver multicast forwarding entries to member interfaces. If the default hold-up period cannot meet the requirement, you can run this command to adjust the hold-up period.

Example

# Set the hold-up period to 3 seconds for a trunk member interface that changes from Down to Up to forward multicast traffic.

<HUAWEI> system-view
[~HUAWEI] interface Eth-Trunk 30
[~HUAWEI-Eth-Trunk30] multicast hold-up 3