Catalyst 9200L Cipher Mismatch

[JamesEdmondsAspall]

Hi,

I've just taken delivery of 4x Cisco Catalyst 9200L switches.

These are my first Cisco switches in about 8 years.

I am trying to connect to the web ui of one of these to start configuring it, however when doing so from IE, Edge or Firefox, I get an ERR_SSL_VERSION_OR_CIPHER_MISMATCH error.

Can anyone help me determine why this issue exists on brand new switches?

Thanks

James

[balaji.bandi]

Glad to know you able to find the solution what you looking to work.

[shaikmohib]

Try logging in with regular console and configure the box as Marce1000 mentioned and then try again. Follow the configure secure shell guidelines form the doc and you should be good. 

let us know if you still need help. 

[JamesEdmondsAspall]

Is the Mini-B port on the switch not standard Mini-B?

I have a USB A to USB Mini-B cable, but it doesn't fit in the Mini-B port on the switch very well.

Additionally, how do I know which COM port to use in Putty when testing this.

Device manager doesn't actually show any COM ports so I'm not sure if I'm missing a step?

[marce1000]

 - FYI : https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9200/hardware/install/b-c9200-hig/b-c9200l-hig_chapter_01.html#id_75422

 >...

     * USB mini-Type B console port

 >...

 M.

[JamesEdmondsAspall]

Ok, I had to REEEALLLLY brute force it into the port, but it is now connected.

[JamesEdmondsAspall · Accepted solution]

Thanks to everyone else for the help and advice.

Summary answer is;

Until you connect to the console and run through the basic switch setup, SSL configuration is not completed on the switch, causing the web interface to not load.

Once you connect to the console port and run through the basic setup, it will sort the SSL config and the webui will then load (albeit with a self signed cert error (to be expected)).

James