We have a Cisco SA 520 setup with a VLAN of 5.X over a Point to Point Metro Connection. We have very slow print times and when running an IPERF test it looks like it takes about 2 seconds to establish the connection and then the speed will increase to the 20Mb that our Metro offers. We have tried both a 520 and 520W with the same config, and have the same issue on both, We have also replaced the SA with a Firebox and the symptoms do resolve. We wold like to continue to use the SA, but not sure what to do. The VLAN are .1.x and .5.x. We have upgraded to the latest firmware as well.