MLD SSM Mapping Overview

Source-specific multicast (SSM) mapping enables the router to determine one or more source addresses for group G. The mapping effectively translates a Multicast Listener Discovery version 1 (MLDv1) multicast listener report to an MLDv2 report, enabling the router to continue as if it had initially received an MLDv2 report. After the router is joined to these groups, it sends out Protocol Independent Multicast (PIM) join messages and continues to enable joining from these groups, as long as it continues to receive MLDv1 membership reports and no change occurs to the SSM mapping for the group.

When you statically configure SSM mapping, the router can discover source addresses from a statically configured table.

The following applies when you configure SSM mapping:

Related Documentation