I have a problem with RDC slowing to a crawl or disconnecting entirely. Client is XP SP3 w/ RDC 6, server is Win 2k8 R2. Both have been scanned thoroughly and found to be virus free.
I downloaded and installed Wireshark on the client computer and ran a packet capture during an RDC session. The log showed at least 10-20 retransmit / dup ack /segment losses per minute during normal usage. Then, when I had a disconnect, it shot up to dozens of these per second.
FYI, I know very little about the Wireshark tool or how to do a full analysis of this problem.
** EDIT **
A little about my network architecture:
- 12 Mb down, 1Mb up
- 1 laptop directly connected to the modem -or- (I've tried it this way with no change) plugged in through a Linksys DSL phone box
- Located in Israel. Telecom services are split into infrastructure and ISP there, infrastructure is provided by HOT, ISP is provided by Netvision.
- 5 Mb down, 5 Mb up
- Medium web/data/app hosting network, routed with Allied Telesyn AR410
- Located in CA (US). ISP is Call America.
Other remote clients have no issues connecting to the servers (either speed or disconnects). Several other laptops have been used at the client location to verify it is not a hardware issue. The cable modem has also been replaced.