IGMP
Addresses
224.0.0.0/4 for IPv4
FF00::/8 for IPv6
IGMP (IP Multicast Group Membership Protocols) and MLD (Multicast Listener Discovery)
IGMPv2/MLDv1
Used in ASM (Any Source Multicast) deployment
Receiver cannot specify which source to receive multicast
IGMPv2 default on NX-OS
IGMPv3/MLDv2
Used in SSM (Source Specific Multicast) deployment
Receiver specifies a list of sources to receive from
MLDv2 default on NX-OS
Note on Nexus Switches
Nexus starts IGMP and MLD automatically. Can't enable IGMP and MLD individually per interface
Nexus automatically enables IGMP when PIM is activated and MLD when PIM6 is activated on an interface
Configuration and Verification
Verfication
show ip igmp membership
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