Hello Everyone,This is the situation:We recently upgraded some C9300-48S stacks to IOS 17.9.4. No other physical or logical change was made on the network.Symptoms:After the upgrade, the ports are selectively down/down. The devices connected are desk...
After some testing, investigation and trials by error, it turned out that the solution was relatively simple. This is the missing line from the config:speed nonegotiateAfter adding this line to the switch port config, all the connections to the vario...
Thanks, Paul, but that's not the case. Your link shows possible solutions for PoE switches.Mine is an SFP switch with FO connections. They don't have PoE features.
