Hello, I opened a similar thread last year regarding the same problem : T2600G logs flooded with errors ' Failed to create Multicast Group hardware.' TP-link support has provided me with a beta build...

@Elmer91 Update on this topic for people reading this later: It was a switch software bug solved by a beta firmware provided by TP-Link support.

I have setup multicast on a T2600G switch. Very basic configuration for the time being (5 ports activated : 1 router + 4 devices). IGMP : activated on VLAN 1 No static router ports defined. MLD :...