A current network design is rendering performance issues when multiple clients are atttempting to stream video.  The overall design warrants a network diagram and some documentation to appreciate the extent of the design; however, I will provide the minimum in the hope that someone would immediately identify a concern, or concerns that may be resulting in the performance impact for video streaming. The components of the design are basically an AP7131 tunneling through the cloud encapsulated in an IPSec tunnel, to a cluster of RFS7000s.  The AP is in dependent mode.  The network is split to provide a route for corporate data and hot-spot users.  The challenge that we curently have is the requirement for up to four concurrent video streams.  With a single video stream, all is well.  The moment a second video stream is initiated the first stream degrades to a point where excessive buffering occurs. The overall design incorporates guest access services where; authentication, content filtering, and firewall rules apply.  The last round of testing on this design was performed with the elimination of the guest services component; however, the nature of the issue has not changed. We will be testing with the AP in independent mode to see if the behaviour changes.  This is simply to note if the issue lies in the tunnel between the AP and the RFS. TAC and WNS engineering are currently involved, traces have been taken and analyzed with inconclusive results; however, I am posting this in the hope that someone out there has encountered this in the past and can provide some insight. All feedback welcomed.