Hi everyone!

We've been tasked with upgrading the network infrastructure of a fairly large hotel, which consists of 5 separate buildings. There's a single data center in the first building and network racks on each floor.

The client had already replaced some old ProCurve switches with new TP-Link switches (TL-SG3452) that are being used as edge switches for the TVs, with one in the data center serving as the querier. It's likely they followed this article: Configuring TP-Link IGMP/MLD Multicast Snooping from derekseaman's blog.

Currently, everything is working perfectly (see the first line of the attached image).

The old ProCurve core switch (5406zl) will be replaced by an FS switch (S5850-24S2Q), and the old edge ProCurve switch (2650) will be replaced with a TP-Link TL-SG3452XP, as you can also see in the attached image (second line).

However, from our tests, this configuration is unable to properly transmit traffic from the IPTV server (in the data center) to the TVs. IGMP snooping is enabled on all devices from the querier to the edge switches.

We can reach the IPTV server correctly from the edge switches, and the VLAN carrying the traffic is correctly configured on all switches. Ports are correctly tagged/untagged, and PVIDs are set correctly. We've submitted our new configuration to the vendors (FS and TP-Link), and they confirmed that everything should work as we've configured it, but clearly, that's not the case.

(Even if we remove the FS switch and go from querier to TL-SG3452XP to TL-SG3452 the problem persists)

Has anyone had this type of experience and can offer any suggestions related to the hardware or configurations?

Thanks in advance!