pim ipv6 holdtime assert

Function

The pim ipv6 holdtime assert command sets the timeout period during which a PIM interface keeps the Assert state.

The undo pim ipv6 holdtime assert command restores the default value of the timeout.

By default, the timeout period during which a PIM interface keeps the Assert state is 180 seconds.

Format

pim ipv6 holdtime assert interval

undo pim ipv6 holdtime assert

Parameters

Parameter	Description	Value
interval	Specifies the timeout period during which a PIM interface keeps the Assert state.	The value is an integer that ranges from 7 to 65535, in seconds.

Views

GE interface view, XGE interface view, MultiGE interface view, 25GE interface view, 40GE interface view, 100GE interface view, Eth-Trunk interface view, VLANIF interface view, loopback interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

On the shared network segment connected to multiple PIM devices, if the same multicast packets reach these PIM devices and pass the RPF check, multiple copies of the same multicast packets are forwarded to this network segment. In this situation, these PIM routers need to initiate the assert mechanism. The router that wins assert election is responsible for multicast forwarding on the shared network segment. Other devices suppress multicast data forwarding and retain the Assert state for a period of time. After the timer for a PIM interface in the Assert state expires, the device that fails to be elected triggers a new round of election.

Prerequisites

IPv6 multicast routing has been enabled using the multicast ipv6 routing-enable command in the system view.

Precautions

This command is valid for PIM-SM (IPv6) and PIM-DM (IPv6).

The pim ipv6 holdtime assert command has the same function as the holdtime assert (IPv6) command in the PIM-IPv6 view. By default, if the pim ipv6 holdtime assert command is not used, the value configured in the PIM-IPv6 view is used; otherwise, the value configured in the interface view is used.

Example

# Set the timeout period for VLANIF100 to keep the Assert state to 100s.

<HUAWEI> system-view
[HUAWEI] multicast ipv6 routing-enable
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] pim ipv6 holdtime assert 100

# Set the timeout period for GE0/0/1 to keep the Assert state to 100s.

<HUAWEI> system-view
[HUAWEI] multicast ipv6 routing-enable
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] pim ipv6 holdtime assert 100