I have a Cisco 3560 switch with sfp uplink to distribution switch. I noticed that the uplink port (dot1q trunk) was flashing amber then green then amber then green. I watched it do this for a good 10 minutes then the link just went dead. I checked the port and it didnt err-disable, it was just down down.
Has anyone experienced something like this or does anyone know what might cause a problem like this.
No errors were detected on the interface.
Thanks in advance.