ssm-mapping (MLD view)

Function

The ssm-mapping command configures an SSM mapping entry to map a multicast source to a group address.

The undo ssm-mapping command deletes an SSM mapping entry.

By default, no SSM mapping entry is configured.

Format

ssm-mapping ipv6-group-address ipv6-group-mask-length ipv6-source-address

undo ssm-mapping { all | ipv6-group-address ipv6-group-mask-length [ ipv6-source-address ] }

Parameters

Parameter	Description	Value
ipv6-group-address	Specifies the IPv6 address of a multicast group configured with SSM mapping.	The value is a 32-digit hexadecimal number in X:X:X:X:X:X:X:X format. The value ranges from FF00:: to FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF.
ipv6-group-mask-length	Specifies the mask length of the IPv6 multicast group address.	The value is an integer, which can be 16, 32, 64, or 128.
ipv6-source-address	Specifies the IPv6 address of a multicast source.	The value is a 32-digit hexadecimal number in X:X:X:X:X:X:X:X format.
all	Deletes all the configured static SSM mapping entries.	-

Views

MLD view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Hosts that support only MLDv1 cannot join SSM groups. To enable multicast devices to provide the SSM service for these hosts, configure SSM mapping on the multicast devices. An SSM mapping entry maps a multicast source to a multicast group. After SSM mapping entries are configured on a multicast device, the device can convert (*, G) information in Report messages of MLDv1 to (S, G) information.

Prerequisites

Layer 3 IPv6 multicast has been enabled using the multicast ipv6 routing-enable command in the system view.

Precautions

You can configure multiple static SSM mapping entries by running the ssm-mapping command several times.
To delete an SSM mapping entry, run the undo ssm-mapping ipv6-group-address ipv6-group-mask-length [ ipv6-source-address ] command. The undo ssm-mapping all command deletes all the SSM mapping entries. Exercise caution before running this command.

Example

# Configure an SSM mapping entry mapping the source address FC00::1 to group address FF35::1/128.

<HUAWEI> system-view
[HUAWEI] multicast ipv6 routing-enable
[HUAWEI] mld
[HUAWEI-mld] ssm-mapping ff35::1 128 fc00::1