On the dashboard the new ports status screen shows connected and speed information against the wrong ports (at least for MX84s, MX100s and MX250s) for us. The CDP information is shown against the correct port. Does anyone else have this issue, we are on n184.
Correct, the ports tab was displaying incorrect speed, connected status, and CDP/LLDP information on all MX platforms. Meraki Dashboard development team is aware of the issue and working towards the resolution. The "Ports" tab has been removed until all these issues have been resolved.
I do not believe that the ability to set port descriptions was added in new "Ports" tab feature on MX. I just submitted a feature request and will encourage you to do the same using the Meraki dashboard's "make a wish" button.