MC3190 disconnects from the wireless network when roaming between access points on a WLAN running Zebra/Motorola Wi-NG 5 infrastructure. What to do?
Change the default settings in firewall policy used by your RF controller or access points. Firewall policy is by default called default:
Configuration > Security > Wireless Firewall > Advanced Settings > un-tick L2 Stateful Packet Inspection > OK > Commit (Commit and Save)