# MLD Traffic Overview

MLDv2 extends MLDv1 functionality with the ability to include or exclude specific multicast traffic sources. That is, with MLDv2, hosts signal (S,G) pairs that they want to include or exclude.

For hosts that cannot signal group membership dynamically, you can use the ipv6 mld static-include or ipv6 mld static-exclude command to statically include or exclude multicast traffic, respectively.

MLDv2 is the industry-designated standard protocol for hosts to signal channel subscriptions in SSM. For additional information about SSM, see PIM Source-Specific Multicast.

#### Related Documentation

- Including and Excluding MLD Traffic