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I recently upgraded our Cisco 3925 with the latest firmware and it returned a segmentation fault. I restarted it and now the console port won't connect. Any ideas on how to restore the flash to a rescue configuration?

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  • Is it storing its configs on an external flash? My other thought is that if the console port has reverted to default settings, which could have been reconfigured in the running-config that your router had before it rebooted.
    – Mark Henderson
    May 4, 2015 at 3:09
  • Don't you get any output on the console port, even no bootloader? If you could access the bootloader, you can try to flash a new firmware image with xmodem...
    – Sebastian
    May 4, 2015 at 8:46
  • I can't seem to connect to the router through the tty. It gave me a segmentation fault and never came up again. I am using internal flash, the regular disk. I just changed the boot image and then committed it. It failed and I haven't been able to get it to work...
    – hazmat
    May 4, 2015 at 22:59
  • Sounds like a really bad problem. I don't think there is a simple way of recovery then. If you have checked that baud rate and everything else is correct and you still can't access even the bootloader, you'd better have a service agreement for the device. Sorry.
    – Sebastian
    May 5, 2015 at 8:38

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