(Optional) Configuring an SSM Group Policy

Context

By default, the Source-Specific Multicast (SSM) group address range is 232.0.0.0/8. Sometimes, the address range of SSM groups must be limited to improve the security of multicast networks. If the addresses in the default range are insufficient, the SSM group address range must be expanded. You can configure an SSM group policy to control the address range of SSM groups.

Procedure

Run system-view
The system view is displayed.
Run pim [ vpn-instance vpn-instance-name | all-instance ]
The PIM view is displayed.
Run ssm-policy basic-acl-number
The SSM group address range is configured.

Ensure that all the devices in the network have the same SSM group address range.