WAN connection is via 1gbps connections to a 20+ gbps (yes 20 gig) layer 3 network, latency point to point is less than 10ms. GRE performance over the entire setup is measuring round 10mbps. My memory says that measured performance to the test system was 6-10 times the current 10mbps.
I can find nothing wrong, devices outside the layer 3 network (both ends of the tunnel) are well below 50% memory and CPU. All interfaces are below 25% utilization.
What else can I check? where else can i check?
Keep in mind the connection does work....just really low performance for the hardware used, and i can't see where the limit on the perfomance is.
Basic diagram via ASCII
Client <-> 3000 or higher cisco switch that is a GRE end point <-> really fast layer 3 network <-> another 3000 or higher cisco switch another GRE end point <-> Speed mesurement server