proxy ssm-policy
Function
The proxy ssm-policy command configures an SSM group address range for IGMP proxy.
The undo proxy ssm-policy command restores the default configuration.
The default SSM group address range for IGMP proxy is 232.0.0.0/8.
Format
proxy ssm-policy basic-acl-number
undo proxy ssm-policy
Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support this command.
Parameters
| Parameter | Description | Value |
|---|---|---|
| basic-acl-number | Specifies the number of a basic ACL. This ACL defines a range of multicast groups. | The sequence number is an integer that ranges from 2000 to 2999. |
Usage Guidelines
Usage Scenario
The default SSM group address range is 232.0.0.0 to 232.255.255.255. Generally, an IGMP proxy device provides the SSM service for hosts only when it receives Report messages with a group address in this range. If the SSM group address range needs to be narrowed to ensure security of a multicast network or be expanded to increase the number of SSM group addresses, configure a new SSM group address range on the IGMP proxy device. Ensure that all the multicast devices on the network are configured with the same SSM group address range.
Prerequisites
IP multicast routing has been enabled using the multicast routing-enable command.
Precautions
The SSM model can be used in the following situations:
- Multicast group addresses are in an SSM address range, IGMPv3 is running on the user network segment, and multicast source addresses are specified in Report messages.
- Multicast group addresses are in an SSM address range, IGMPv1 or IGMPv2 is running on the user network segment, and SSM mapping is configured.
The proxy ssm-policy command works with the acl command. If a basic ACL is configured, you can specify source in the rule command to configure an SSM address range.