Unable to connect to a Cisco 3850 router in CNA - Unsupported Device Type

[andrewenger]

I am trying to connect a Cisco 3850 router to my community in CNA.

This worked fine with version 03.03.03SE (CAT3K_CAA-UNIVERSALK9-M) using the following settings:

enable secret 5 xxxxxx
username admin privilege 15 password 7 xxxxxx
ip http server
ip http authentication local
ip http secure-server

Yesterday, we upgraded the IOS firmware of this router to the latest recommended version Version 03.06.03E (CAT3K_CAA-UNIVERSALK9-M).

Since then, we're unable to discover the topology. For an unknown reason, access to 3850 router occurs via http and not https in CNA:
communication: http
Status: Unsupported Device Type
Device Type: WS-C3850-12S

When deactivating http (no ip http server), we get "Connection Failed"

[andrewenger]

What I didn't mention is that the master has changed on our 3850 stack.
Previous master device was a WS-C3850-48T. Now, it's a WS-C3850-12S. Maybe WS-C3850-12S devices are not supported in CNA 5.8.9.1.

[andrewenger]

Electing a new stack master (WS-C3850-48T device) solved the problem.