Specifying the IPv6 SSM group range

About the SSM-group range

When an IPv6 PIM-SM enabled interface receives an IPv6 multicast packet, it checks whether the IPv6 multicast group address of the packet is in the IPv6 SSM group range. If the IPv6 multicast group address is in this range, the IPv6 PIM mode for this packet is IPv6 PIM-SSM. If the IPv6 multicast group address is not in this range, the IPv6 PIM mode is IPv6 PIM-SM.

Restrictions and guidelines

Configure the same IPv6 SSM group range on all devices in the entire IPv6 PIM-SM domain. Otherwise, IPv6 multicast information cannot be delivered through the IPv6 SSM model.

When a member of an IPv6 multicast group in the IPv6 SSM group range sends an MLDv1 report message, the device does not trigger a (*, G) join.

Procedure

  1. Enter system view.

    system-view

  2. Enter IPv6 PIM view.

    ipv6 pim

  3. Configure the IPv6 SSM group range.

    ssm-policy ipv6-acl-number

    The default range is FF3x::/32, where x can be any valid scope.