Cisco 3850 firmware upgrade

[Dilanjan]

Hi Team

I have upgraded the firmware of WS-C3850 switch  to 16.12.05b , and after the reboot it didn't allow me login with the admin credentials.  but I can ping into the switch, is there any changes happen to admin login after the firmware upgrade

Thanks in advance

Dilanjan 

[Flavio Miranda]

Software upgrade must not change the config. Now you need to get a console cable to look at the switch. 

 Does it at least ask for user and password right?

[Dilanjan]

Yes it asked for Uname and password, but the old password is not accepting now. It was accepted previously (before the firmware upgrade)

[Flavio Miranda]

If you are sure you are enter the right credencial and it does not accept,  you will need console.

 On suggestion is try to use HTTP or https.

 If not possible also, then console it is.

[Dilanjan]

I tried to connect to it through Console and also through SSH, via Putty, but the same it is not accepting the admin password.

It happened after the firmware upgrade. It was accepting the creds before the upgrade. 
I did update few switches (same model) but none of them give me this trouble. 
 

[Flavio Miranda]

Unfortunatelly you need to perform factory reset. 

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/system_management/configuration_guide/b_sm_3se_3850_cg/b_sm_3se_3850_cg_chapter_01110.html#task_1099467 

Go to the session "Recovering from a Lost or Forgotten Password"

[Dilanjan · Accepted solution]

Ok Thanks Flavio

I will try that, thanks a lot