IGMP and MLD Snooping

Snooping can be configured globally or at the VLAN level. Each cluster device in the MCT VLAN can be configured as active or passive. There is no restriction for cluster devices to run active-active or passive-passive configurations.

The following examples show configuration commands for the VLAN level (IGMP and MLD), the global level (IGMP and MLD), and for PIM-SM and PIM6-SM.

Note: If the keepalive VLAN becomes unreachable when the ICL LAG is down, Layer 2 multicast traffic might be affected. If the peer that is the querier becomes the slave, router ports will not be learned on the clients.

  • VLAN level (IGMP) 

    device(config)# vlan 100
device(config-vlan-100)# multicast active/passive

  • VLAN level (MLD) 

    device(config-vlan-100)# multicast6 active/passive

  • Global level (IGMP and MLD) 

    device(config)# ip multicast active/passive
device(config)# ipv6 multicast active/passive

  • PIM-SM snooping (configured only on a VLAN and requires IGMP snooping to run in passive mode) 

    device(config)# vlan 100 
device(config-vlan-100)# multicast passive
device(config-vlan-100)# multicast pimsm-snooping

  • PIM6-SM snooping (configured only on a VLAN and requires MLD snooping to run in passive mode) 

    device(config)# vlan 100 
device(config-vlan-100)# multicast6 passive
device(config-vlan-100)# multicast6 pimsm-snooping
Parent topic: Layer 2 Multicast Snooping over MCT