Hello,
I had a strange problem. On a stack of A5500-EI SFP swtiches all fiber ports were offline, i.e. all corresponding LEDs were off.
- As the "uplink ports" were TP ports, the switch was accessible via SSH.
- On the switch I did a "shutdown" and "undo shutdown" on several ports: No effect. No log entry that the inserted SFP modules were found
- rebooting the stack didn´t help
- Removing stacking cables and modules and reboot: nothing changed
- Deleting *.cfg on the switch and reboot: nothing changed
- I did an bootrom upgrade with them same btm710 version, which already was on the switches and and upgraded to the latest R2215 afterwards. result: It´s working again
Has anyone ever had that kind of problems?