@Clive_A Thanks for the continued support. FYI I have just purchased and tested the same setup with a SG2210MP and this behaves correctly straight out of the box; the IGMPv2 Join Group message is...

@Clive_A The info you requested is visible in the previous Wireshark capture. In this setup:- The PC is address 192.168.0.115 There is a VM on the PC at address 192.168.0.117 You can see IGMPv3...

@Clive_A Thanks for continuing to look into this, your help is much appreciated. The PC is in the mutlicast group - I have used the `socat` utility to ensure it is joined. I have disabled IGMP...

@Clive_A Thanks for the follow-up. The router (in this case, a TP-Link AX-1800) sends IGMPv3 membership queries every 255s or so. I can see IGMPv3 replies from several devices at this point, but not...

@Clive_A Thank you very much. Regards, Chris

@Clive_A Thank you for clarifying, so understand I need to look at the SMB switches rather than home office. Can you please confirm the operation of the SG1005LP has the fault as described above, and...