IGMP Snooping Configuration Notes for Layer 3 Devices

  • If Layer 3 multicast routing is enabled on an interface or VLAN, do not attempt to enable Layer 2 IGMP snooping on the interface or VLAN.
  • If the "route-only" feature is enabled on the Layer 3 Switch, then IP multicast traffic reduction will not be supported.
  • IGMP snooping is not supported on the default VLAN of Layer 3 Switches.