Good Day, we're running C9200L-24P-4X as layer two switches in the environment with IOS Dublin-17.11.1, we started upgrading to the latest release Cupertino-17.9.5 . Some switches just worked fine and others completely lost connection even with devic...

Good Day, I've recently upgraded some of the switches to C9200-24T-4X-E, this switch is connected to another layer 2 C2960S via the uplink port as a trunk. so it was running fine for two months and suddenly last two days the uplink port shows on both...