Cisco – Converting Lightweight AP to Autonomous AP

Appears there is no physical compactflash module in slot 0, appears to have on in slot 1 with at a minimum a corrupted file system and at a max bad physical flash as you are getting file system sector error and the storage areas are corrupted. Can't write the crashdump file and that is why you get the repeated reboots after 5 minutes. If control break is enabled then after the first few seconds after power on you can hit control break and dump out to the rommon prompt: May have to type flash_init to activate the file system, type set to see where it is pointing to for the ios file then type dir flash1: and see if it can read the file system. If you have access to the ios from either a backup or from another 3925 copy it to a usb stick and put in the usb flash slots if your model has them. I believe it does. I try and use 1gb sticks and smaller. Not all Cisco routers will accept the larger sticks. From the rommon prompt: type usbflash0 or 1 depending on which slot you put it in and see if the router can see the stick and the files. If so you can boot off of the usb stick. prompt: boot usbflash0:file name and hit return. If the rest of the router hardware is good then it will boot up without a config. May get a few errors go by because the rommon set is pointing to the bad flash for the config and license file but will come up if hardware is good. Best you can hope for at that point. You may be able to reformat the flash file system. If you have licensed any features when the router was purchased you will need the license file to turn on more than the base default license. Definitely either corrupted file system or bad flash.

You can erase the startup-config and reload to get the factory configuration.

I think you mean Layer-3, not Level 3, and it is a Layer-3 switch.

A best practice for security is to disable the HTTP server and HTTP secure-server in Cisco devices, but you can enable it with the ip http server command. You will need to have a configured IP address on the switch which you can reach for the web interface to work.

Without a complete network design, we can't begin to guess how you have it connected or your needs, and we would just be guessing on a proper configuration.

Note:

This is all very simple stuff for a switch, and I would strongly recommend you get someone who knows how to do this to configure it for you. It is not a simple thing like a home router, and it sounds like you don't have a firewall protecting it, which seems a very foolish idea.