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Hierarchy Level


Accept and process only (S,G) reports for source-specific multicast (SSM) groups when:

  • You configure IGMP snooping for IGMPv3 with IPv4 multicast traffic in an EVPN network.

  • You configure Multicast Listener Discovery (MLD) snooping for MLDv2 with IPv6 multicast traffic in an EVPN network.

Devices use IGMP and MLD to discover and indicate interest in multicast groups. IGMP or MLD snooping restricts the forwarding of multicast traffic to only those interfaces in a bridge domain (VLAN) that have interested listeners.

By default, when IGMP snooping or MLD snooping is enabled, the device accepts and processes IGMPv2, IGMPv3, MLDv1 or MLDv2 (*,G) (any-source multicast [ASM]) reports. IGMPv3 and MLDv2 also support (S,G) source-specific multicast (SSM) reports and queries, but accepting and processing both (*,G) and (S,G) reports at the same time is not supported. When you enable the evpn-ssm-reports-only option for IGMP or MLD snooping, the device honors only IGMPv3 or MLDv2 (S,G) reports, and drops any IGMPv2, IGMPv3, MLDv1 or MLDv2 (*,G) reports.

Required Privilege Level


Release Information

Statement introduced in Junos OS Release 18.4R1.

Statement added in Junos OS Releases 19.4R2 and 20.3R1 on ACX Series routers with EVPN multicast support.