The igmp-snooping ssm-policy command configures an SSM group policy in a VSI. All the multicast groups permitted by the SSM group policy are SSM groups.
The undo igmp-snooping ssm-policy command deletes the SSM group policy from a VSI.
By default, no SSM group policy is available in a VSI.
Parameter |
Description |
Value |
|---|---|---|
basic-acl-number |
Specifies the number of the basic ACL that defines the range of SSM groups. |
The value is an integer that ranges from 2000 to 2999. |
Usage Scenario
SSM allows multicast group addresses in the range of 232.0.0.0 to 232.255.255.255. If hosts need to join multicast groups out of this range or they are allowed to join only some of multicast groups in the range, configure an SSM group range for the hosts.
Prerequisites
IGMP snooping has been enabled for VPLS using the igmp-snooping over-vpls enable command in the system view.
Follow-up Procedure
Enable SSM mapping and configure SSM mapping entries in the VSI. The multicast group in an SSM mapping must be in the SSM group range.
Precautions
The configuration takes effect only when IGMP snooping is enabled in the VSI using the igmp-snooping enable (VSI view) command.
This command must reference an ACL. Before using this command, create an ACL and configure rules for the ACL. By default, the ACL applied to an SSM group policy denies all multicast groups. Therefore, to exclude specific group addresses from the SSM group address range, use a rule permit source any rule with deny rules in the ACL. For details about ACL configuration commands, see ACL Configuration Commands.
# Specify multicast group 225.1.1.123 as an SSM group in VSI comany1.
<HUAWEI> system-view [HUAWEI] acl number 2000 [HUAWEI-acl-basic-2000] rule permit source 225.1.1.123 0 [HUAWEI-acl-basic-2000] quit [HUAWEI] igmp-snooping enable [HUAWEI] igmp-snooping over-vpls enable [HUAWEI] vsi comany1 [HUAWEI-vsi-comany1] igmp-snooping enable [HUAWEI-vsi-comany1] igmp-snooping ssm-policy 2000