pim require-genid

Function

The pim require-genid command configures a PIM interface to reject the Hello messages without the generation ID.

The undo pim require-genid command restores the default configuration.

Format

pim require-genid

undo pim require-genid

Parameters

None

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

By default, a PIM interface receives the Hello messages without the generation ID.

After an interface on a FW is enabled with PIM, the FW generates a random number as the generation ID of the Hello message. If the status of the FW is updated, the FW generates a new Generation ID.

If a FW finds that the Hello message received from a PIM neighbor contains a different Generation ID, the FW considers that the status of the PIM neighbor changes.

You must run the multicast routing-enable command to enable the multicast function before using the command.

Example

# In the interface view, configure FWs to reject the Hello messages without the generation ID.

<sysname> system-view
[sysname] multicast routing-enable
[sysname] interface GigabitEthernet 0/0/1
[sysname-GigabitEthernet0/0/1] pim require-genid