IGMP Issue

[networkman2]

I got a wifi setup with 6 TP Link access points. The net works fine for some time but then it crashes randomly after a few hours or days. The setup is as follows:
6 TP Link Access points (TL-WA801ND) ---> Cisco Small Business Switch (SG102-24) -----> Linksys WRT 1900AC router

All access points have the same SSID and securty settings.

After playing around with wireshark, I found that the issue occurs randomly when the user switches between access points. During that time, wireshark shows that 2 or more access points flood the network with IGMPV2 Memership group report messages

To get out of this loop, I remove all the access points one by one, until only one is left connected and everything goes back to normal. The story repeats itslef as soon as I switch from one access point to the other.

I need help from you guys on how to fix this issue, do I change the access points or should I replace the network switch with a managed switch.

Thanks

 

[azazel1024]

Are there specific APs that are doing it? Because that is extremely odd. Latest firmware on them?

I've been running 3 APs (technically one is in my router) and I've never seen IGMP flooding from any of them or other network stability issues, devices roaming or not roaming.

 

[networkman2]

Hi azazel1024, thanks for the reply.

The flooding is caused by random APs, it can be a combination of any of the 6 APs e.g. sometimes it will be 2 APs, and other times its 3 APs and its not always the same AP.

 

[networkman2]

The firmware is upto date.

 

[JayGuerette]

I recently replaced my 2 TEW-637APs with 2 new TL-WA801NDs, and experienced that exact same issue this morning. I rebooted them to immediately stop the flooding, and then checked "Enable AP Isolation" on both units. It may take a while to see if it resolves the problem.

Interestingly, this was a known issue with the V2 devices that was subsequently fixed. These are V3, and we shouldn't expect the same issue...