I just got a CSS106 and tried to upgrade the firmware. After waiting a few minutes, I rebooted and noticed that the version is unchanged. I tried it again and now the firmware is 2.7p. I kept trying this again a few more times, and now the switch can’t get DHCP or have its webpage accessible. I can sometimes ping it, but the pings come back in the wrong order and take seconds. Is there something I can do to fix this?
Update: I fixed it by setting up a ping on my computer and by restarting it until the backup firmware loaded. Then, I set up a good static IP on the switch and let it download the new firmware.