That's a good lead. I guess a good test will be setting up a tunnel on fastethernet. If the tunnel performance is independent of the bandwidth, it's likely the switching path. TX

Note that searches on "gre performance" show a large number of new forum questions...I think 12.3 has a problem. We are using GRE with 12.3(8T) no encryption and seeing performance with TCP is 1/3 performance with UDP (which is near rated speed). My ...