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Posted: 2022-11-2207:55 AM
AP9641 intermittently loses connection to cisco catalyst 9300 switch
I have several sites with new APC SMT3000 UPS's that constantly lose connection to the network. The network card firmware is 126.96.36.199. This is constantly causing the monitoring system to send out emails and warnings. Dialing into the card there is nothing in the logs to show the card went down.
At the site, I could see the link light on the front of the switch go off, yet the link light on the card never did, so i am wondering if the switch is having an issue where it constantly has to re-establish a connection. I do not have this problem with the AP9361, I swapped my last on out with one of the troublesome UPS's and all problems went away.
I have replaced the card with another AP9641, moved to a different port on the switch, used 2 different brand new LAN cables, changed the port speed on the card from automatic to 100 and 10 full duplex, reset the switch ports to default, tried turning on and off POE, still having the same problem.
I have two SMT1500 UPS's on the network not having any issues with the AP9641, same set up except the firmware on the cards is 188.8.131.52. They are not experiencing any problems. All UPS's have the same ID18 9.8 firmware in them.
One final thing, if I start a continuous ping from my laptop to the network card, it never loses connection, even over several hours, yet as soon as i stop the ping the intermittent communication loss starts.