Cisco APIC Layer 3 Networking Configuration Guide, Release 6.2(x)

Guidelines and limitations for MLD snooping

Updated: April 17, 2026

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Outlines the guidelines and limitations for the MLD snooping feature.

The MLD snooping feature has the following guidelines and limitations:

MLD snooping is supported only on new generation ToR switches, which are switch models with "EX", "FX" or "FX2" at the end of the switch name.
Support is enabled for up to 2000 IPv6 multicast groups to be snooped across the fabric.
Hardware forwarding happens with the (*,G) lookup, even for the source-specific snoop entry with MLDv2.
The following features are not supported for MLD snooping in this release:
- Layer 3 multicast routing across bridge domains or VRFs is not supported for IPv6 multicast traffic
- Static MLD snooping entry
- Access filter for MLD snoop entries through a route map
- Virtual endpoints behind the VTEPs (VL)

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