Have a strange one trying to nail down here.
A pc at a remote branch (across a full p-to-p T-1) has extremely slow responses accessing the internet. The PC does use a proxy server to handle the internet requests. There is virtually no load in the T-1 and the issue seems to clear up sometimes. The users at the main site don't experience slowness to the same internet sites while using the same proxy server. To me it really looks like something with the proxy server, but then how do you explain the fact the users at the headquarters don't experience the issue. Also several other branch sites may be experiencing this same issue while other branch locations are not. Could this be a MTU issue or something else? It's strange that users at the main site don't experience the issue, and while the issue is happening the T-1 links to the remotes are at less than 5% utilization. There is nothing fancy no nating or anything with the devices configs.
I did perform a packet capture (see attachment) from the proxy server (10.101.4.19) of the clients request (10.122.59.11) and see gobs of TCP retransmissions.
Any advice from to point me in a direction would be greatly appreciated.