We have used the Symbol Scan guns for quite some time on our wireless networks. Recently we upgraded a location that had Cisco 1242 AP's, to the newer 2602i model. The controller is a 5508 on version 7.3, and the access points are operating in FlexConnect mode.
Since upgrading to the 2602i AP's. we have had many issues with the Symbol MC9090 scan guns. They appear to be roaming very frequently between AP's servicing this area. At first we thought it was coverage, and added more access points. We are still seeing the same problems. The signal strength fluctuates on the scan gun from excellent to poor very often, and I notice packets getting dropped during this process.
The application runnig on the scan gun will halt, and either normailze or cause the device to have to be completely reset. These problems were not happenng before we upgraded to the new model of AP. I have read the document Cisco published concerning best practices for Symbol/Motorola scanners and controller based networks, but that is fairly old and out of date. We do have CCKM, Aironet IE, and Band Select enabled on this WLAN. I assume I should probably disable these features but we have other scan guns using this same WLAN with no problems. The biggest change was when we went from the 1242 to the 2602i. During this change, we also moved also from a controller where the AP's were in local mode, to now the access points operating in Flex connecting to a central controller. Latency between the AP's and the controller is not a problem.
Any help would be greatly appreciated.