Disable DTP / Unknow protoclols

[Brandon0712]

Hello Community Meraki.
I want a consulting.
While in observation one interface in Catalyst to MR56 ,I realized that it has "unknown protocols". I clear the counters. I thought it might be DTP, but i verify te interface and are "no switchport nonegotiate".

I clear counters, the "hellow" mesage it recived at 30 seconds, i think that MR55 send DTP.

Do you know something similar?

Thanks for the support.

[alemabrahao]

To disable DTP you can run this command on the switch port:  switchport nonegotiate

Solved: switchport no negoiate command - Cisco Community

[Brandon0712]

Thanks for the clarification.

I already applied the command but I still receive unknow protocols 😕

[PhilipDAth]

Try doing a packet capture and see what shows up.

[Brandon0712]

Good idea, I'll try it.
thank you