# ip block-multicast-sources

#### Syntax

[ no ] ip block-multicast-sources

#### Release Information

Command introduced before JunosE Release 7.1.0.
Profile Configuration mode added in JunosE Release 8.1.0.

#### Description

Prevents mroute creation by blocking multicast traffic that has a scope larger than link-local (for example, global). In Profile Configuration mode, blocks multicast sources per user on dynamic IP interfaces. The no version restores the default behavior of creating mroutes upon receiving multicast packets.

#### Mode

Interface Configuration, Profile Configuration