I have a setup of 2 WLC 4402 with multiple 1310 LWAPP APs. The mobile clients are all ethernet devices that go through 1310(IOS) programmed as Workgroup bridges. Everything works fine when there is no roaming. Everything works fine when a WGB roam from an AP on one WLC to another AP on the other WLC. Where I have problems, it's when the WGB roam from an AP to an other AP that are on the same WLC. When that happens, the connectivity with the WGB keep working fine, but I loose connectivity with the client behind the WGB for 30 seconds and then I get the connectivity back. I analysed the traffic from the client behind the WGB and a PC on the LAN. the traffic flows from the client to the LAN's PC, but the traffic from the LAN's PC never reaches the client behind the WGB until the 30 seconds passes.
Have anybody seen that before or have any idea of what could cause that or better know the solution to my problem ?