I have 16 ip cameras, connected to the server with RTSP h264/mpeg4, 1280*720, via Cisco sf300-24p, powered by POE. Sometimes a few cameras suddenly lost packets, then they become unavailable in RTSP, i mean the software like VLC or ivideon don't receive video in RTSP stream at port 554. But web interface GUI still available and video in GUI also comes at web port 80. After 10-300 minutes web interface also becomes unavailable. No ping. But leds on camera and switch flash. After rebooting of the switch or changing port "Up-Down-Up" cameras work again, RTSP available. But 1-30 minutes and the problem come back again. In the port statisctics there are many errors. But I can't see details, in the switch GUI I haven't found tools for understanding. I changed LAN connectors on the cable from both sides, checked with Fluke Microscanner 2, but not sure the problems is on cable. Connecting to another port doesn't resolve the problem. Changing rtsp to another port, ie 5540, is also unhappy - cameras work, then unavailable. At all time 12-14 cameras are almost work perfect, no errors in port statisctics. But 2-4 cameras have such problems. All they have similar firmware and settings. When I connect them on a short patch-cord they work perfect. Maybe this is a cable problem, but why port 80 work a long time, after then sometimes crash, but port 554 rtsp not available? Maybe switch collect errors and how to see them?
