We've been banging our heads against the wall for the last couple days trying to solve the issue with our Zebra scanners and roaming between APs. Support advised us to disable Mandatory DHCP and it worked, the first thing we said after that is that that setting needs an 'i' info bubble!  I found this in the documentation today, and it's exactly what needs to be in that info bubble. "Enabled: Wireless clients associated to an AP (either new associations or clients that roamed from another AP) that have not requested a DHCP address are placed in a blocked state and are not able to send any traffic on LAN and WAN." ... View more

I just found this thread after experiencing the exact same issue with Zebra scanners and our brand new Meraki APs. Meraki support advised us to disable Mandatory DHCP and it fixed the issue right away. We're on MR30.6 firmware, so I can report that it hasn't changed. Extremely happy that we figured out what was causing our problems and how to fix it though.  ... View more