Symptom

+ Documentation is mentioning that OMF mode is by default disabled on N9Ks. + Output of `show ip igmp snooping` is showing OMF enabled by default: `show ip igmp snooping` Global IGMP Snooping Information: IGMP Snooping enabled Optimised Multicast Flood (OMF) enabled < ------- IGMPv1/v2 Report Suppression enabled IGMPv3 Report Suppression disabled Link Local Groups Suppression enabled IGMP Snooping information for vlan 1 IGMP snooping enabled Lookup mode: IP Optimised Multicast Flood (OMF) enabled < ------- It is not possible to enable or disabled OMF: FX(config)# no ip igmp snooping optimise-multicast-flood ^ % Invalid command at '^' marker. FX(config)# ip igmp snooping optimise-multicast-flood ^ % Invalid command at '^' marker.

Conditions

+ N9K/N3K switches running + Software 7.0(3)I7(x), 9.2(x), 9.3(x), 10.2(x)

Workaround

No workaround needed, problem seems to be purely cosmetic.

Further Problem Description