A stand alone ISA server with two NICS. It stands back a motorola router with a 64 Mbps CIR Frame Relay WAN link. All i want to do is to set the 200 priority to http protocol and rest would be 100. As soon as i enabled the effective bandwidth as 64 none can download a page web without clicking the refresh botton for a few times. Also some web pages dont appear sometimes and appear sometimes. If you bypass the isa or disable the effective banwidth everything is ok. I have been working this issue nearly for a month. I digged into the whole MS KB and i tried nearly everthing. But i have some suspects though. Is there a possibility of incompability of router with the isa bandwidth features? What is the effective bandwidth? Isnt the actual bandwidth of the WAN link? Is there any secret rules to create a bandwidth rule? MOREOVER IS THERE ANY SECRET WAY TO MAKE THIS BANDWIDTH TO WORK? THANKS FOR ANY HELP OR COMMENT. P.S: This is my 3rd writing about this problem. I hope someone responds.