Need Help With Network Failures

[ShawnInPaso]

Edit to add: the lan connections from the 4 port switches to the 16 port switch do not light up at all??

I have an 11 camera setup using Blue Iris but recently 5 of the cameras have stopped communicating over the LAN. The only thing in common is that the five cameras use TP-Link POE switches (3 cams on one switch and 2 cams on another). They did not fail at the same time. When the first one failed a few days ago, I did a lot of troubleshooting and thought the switch was failing because it was intermittent. So I replaced the switch and all was good. Today, the new switch and the other one failed at the same time. I've checked power, point to point connectivity on the cat6 cable to the switches and cameras, but the cameras do not show up on the client list and cannot be pinged. Other cameras connected to the 16 port switch are powered separately are working fine. I've attached a diagram, mainly all cams connected to the 4 port switches have failed and I don't know why? I have had this system working without issue for years.

Thanks for any help!

 

[TonyR]

Where is the BI server connected?
What do the arrow points boxed in red below mean?

 

[ShawnInPaso]

@TonyR

Thanks for asking - good questions I should have explained in my post and diagram.
The 'arrows' indicate WIFI connections. The BI server is connected to the 16 port switch.

 

[Revo2Maxx]

So the AP and Wifi cameras are still working from the one switch? Yet all other cameras that were connected on POE ports and powered by POE Switch have failed? This sounds like there is an issue with the POE switches.. Seeing from your diagram the Ap is powered by awlwort and not POE?.. I would double check the POE switches to make sure they are still able to provide power?

Edit: I would also double check that none of the Cables you are using are CCA.. That is a POE Killer depending on length of cable and types of POE cameras being powered. Time is faster the larger the POE requirements..

 

[ShawnInPaso]

@Revo2Maxx
Good observation. Here again I failed to include all the details. I have other cams plugged into the 16 port switch which are powered directly, not by POE. Seems it's just the POE cams that fail? The cables are quality stuff, not CCA. Initially I suspected a bad cable when only one of the two 4 port switches failed, but I checked it end-to-end for connectivity and it is good. When the other 4 port switch had the same issue, it seemed something else was going on? It has been a head scratcher for me as I haven't had any issues like this in the past. Everything is on the same network, maybe some kind of IP issue?