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Configuring the SSM group range
When a PIM-SM enabled interface receives a multicast packet, it checks whether the multicast group
address of the packet is in the SSM group range. If the multicast group address is in this range, the PIM
mode for this packet is PIM-SSM. If the multicast group address is not in this range, the PIM mode is
PIM-SM.
Configuration guidelines
• Perform the following configuration on all routers in the PIM-SSM domain.
• Make sure the same SSM group range is configured on all routers in the entire domain. Otherwise,
multicast information cannot be delivered through the SSM model.
• When a member of a multicast group in the SSM group range sends an IGMPv1 or IGMPv2 report
message, the device does not trigger a (*, G) join.
Configuration procedure
To configure an SSM group range:
Ste
Command Remarks
1. Enter system view.
system-view N/A
2. Enter PIM view.
pim
N/A
3. Configure the SSM group
range.
ssm-policy acl-number The default range is 232.0.0.0/8.
Configuring common PIM features
Configuration task list
Task at a
lance
(Optional.) Configuring a multicast data filter
(Optional.) Configuring a hello message filter
(Optional.) Configuring PIM hello message options
(Optional.) Configuring common PIM timers
(Optional.) Setting the maximum size of each join or prune message
(Optional.) Enabling BFD for PIM
(Optional.) Enabling SNMP notifications for PIM
Configuration prerequisites
Before you configure common PIM features, complete the following tasks:
• Configure a unicast routing protocol so that all devices in the domain are interoperable at the
network layer.
• Configure PIM-DM or PIM-SM.
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