ssm-mapping (IGMP view)
Function
The ssm-mapping command configures SSM mapping rules.
The undo ssm-mapping command deletes SSM mapping rules.
Format
ssm-mapping group-address { mask | mask-length } source-address
undo ssm-mapping { group-address { mask | mask-length } [ source-address ] | static all }
Parameters
| Parameter | Description | Value |
|---|---|---|
| group-address | Indicates a multicast group address in dotted decimal notation. It is used to specify a multicast group. | The address is in dotted decimal notation.The value ranges from 224.0.0.0 to 239.255.255.255. |
| mask | Specifies the mask of a multicast group or source address. | The value is in dotted decimal notation. |
| mask-length | Specifies the mask length of the multicast group address. | The value is an integer that ranges from 4 to 32. |
| source-address | Specifies a multicast source address in dotted decimal notation. | The value is in dotted decimal notation. |
| static all | Clears all configured static SSM mapping rules. | - |
Usage Guidelines
By default, SSM mapping rules are not configured.
When a host supports IGMPv1/v2 Report messages rather than IGMPv3 Report messages, the host cannot join groups in the SSM group address range.
By default, the SSM range of group addresses is from 232.0.0.0 to 232.255.255.255. You can configure the group addresses out of the SSM range of group addresses. The group addresses out of the SSM group address range are applicable to the ASM model.
The configured SSM source/group address mapping entries take effect only after SSM mapping is enabled on the interface by using the igmp ssm-mapping enable command.
You are recommended to run the undo ssm-mapping group-address { mask | mask-length } source-address command to delete a certain SSM mapping rules.
Run the undo ssm-mapping static all command unless you want to clear all configured SSM mapping rules.