04-13-2026 03:02 AM - edited 04-13-2026 03:04 AM
We recently tried updating a stack switch model C9300-24UX
When trying to get onto the boot loader after holding the mode button down on boot up getting the switch prompt below
The mini usb console cable will not work what so ever at the front of the switch, the rear rj45 cable allows access to see below, but wont allow any key commands,
Even when the switch is allowed to boot normally it is the same as below and not allowing me to use a keyboard to enter anything what so ever
Initializing Hardware...
Initializing Hardware......
System Bootstrap, Version 17.12.1r, RELEASE SOFTWARE (P)
Compiled Mon 04/24/2023 22:21:00.36 by rel
Current ROMMON image : Primary
Last reset cause : PowerOn
C9300-24UX platform with 8388608 Kbytes of main memory
switch:
04-13-2026 03:31 AM
- @GynnNewey4213 Looks like a possible issue with the rj45 cable ; perhaps try another one.
Also for reference ;
restart your terminal operator program, or try another one
M.
04-13-2026 03:38 AM
Appreciate your response, I have tried another cable same issue again, the switch wont go into the bootloader, seems something is corrupt. I have tried holding down the mode button on startup for 30 secs, again get the same screen. Any advice welcome, I have tried the RJ45 and putty on a working switch no issues
04-13-2026 03:49 AM
- @GynnNewey4213 From which version did you upgrade from ?
M.
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