# ipv6 block-multicast-sources

#### Syntax

[ no ] ipv6 block-multicast-sources

#### Release Information

Command introduced before JunosE Release 7.1.0.

#### Description

Prevents mroute creation by blocking multicast traffic that has a scope larger than link-local (for example, global). The no version restores the default behavior of creating mroutes upon receiving multicast packets.

#### Mode

Global Configuration