Need Help Fixing Web UI on Cisco 3750 Switch (error 400 on wepage)

[Matis]

This is my first time troubleshooting something like this.

Here’s my situation:

• After upgrading the switch software, the Web UI stopped working, giving a 404 error.
• I tried reinstalling the software using the .tar file that includes the HTML files, but the Web UI still doesn’t work and now shows a 400 error.

I’ve been looking for a solution online but haven’t found anything that works. Any advice would be greatly appreciated!

Thanks,
Matis

[marce1000]

  - Some items to try : clear the browser's cache
                                   check the logs on the switch when you get this (CLI)

  M.

[MHM Cisco World]

share config you use 
also try use different browser or update java 

MHM

[Flavio Miranda]

@Matis 

 Try to restart thr HTTP service with command 

 no ip http server 

then, enable again

 ip http server 

Reboot the switch and check the config with "show run | i http

Make sure you trying to access the switch using HTTP and not HTTPS. Browser is changing to HTTPS automatic. 

[Matis]

Alright, first clearing browser cache has been tried,

The config is fine and going to the webpage works until i press
WebConsole

@Flavio Miranda 

I restarted the http service as mentionned
and it did change something, the error went from 400 to 404

when trying to use the webconsole

[Matis]

Just to make it clear i don't need to web console for me but its for someone who wants to use it and doesn't know how to configure a switch outside of graphical interfaces, so he kind of needs it.

[Flavio Miranda]

Did this user use this priviously?  3750 via web interface seems to be trick. 

The error 404 means page not found. 

[Matis]

If the web interface was used previously?
No it was not

i was aware that 404 meant page not found, but the html files are there so i dont see why this error should occur

[Matis]

Im starting to think its because the html folder is not at the root of flash

i tried moving only the homepage file to see what would happen and the error changed back to 400
so il try moving html to the root see if that does it (would be weird)

[Flavio Miranda]

How did you upgrade the switch?  The files should be in the right place. 

Also, make sure you have enough espace on the flash. Upgrades usually take more espace for  the new IOS

[Matis]

i uploaded the tar file on the switch then extracted it
then i changed the path for the bin file so it corresponds to the new one 

(i used reload on the switch after)

[Leo Laohoo]

Try using PaleMoon browser or download a very old Firefox browser.

[Matis · Accepted solution]

Turns out theres a weird issue with tar that stop certain files from extracting correctly which turned out to be the problem. Thanks for the help.

-Matis