I am having an issue with a WAN link I have across my MPLS. When I ping across the wan from edge to edge I am getting upwards of 600ms. When I am on the suspect router at the suspect site and I ping the ip of the local serial interface it goes into the 1000ms range. Can someone provide some help with how I could proceed to find the problem? I have also called the telco company and they have done "tests" on the line stating that there were no problems.
update: I have a mrtg tool running collecting info from the interface and it looks to me that the interface is almost at max capacity. could line saturation cause the symptoms i am describing?