We are using a 836 router for connecting to the Internet via PPoE.
I recently introduced in our LAN a Vista workstation. The user of this workstation cannot download large files e.g. from Yoursendit service.
I switched the cisco router to the lousy free router that the ISP provider bundles with the connection and everything works like a charm!
After googling a lot for troubleshooting this, I believe my issue is related somehow this framentation of files. I have tried the following:
- Setting mtu size on the outside interface to 1492
- Setting ip tcp adjust to 1452 and 1350
- Setting Vista mtu size to 1492, 1452 and 1350
- Disabling Vista PMTDU discovery by including a registry DWORD EnablePMTUDiscovery
- Praying to Gods...
My issue must be related with some difference to default IP configuration which Vista introduced, because XP workstations are not experiencing the problem.
Any ideas on how to further troubleshoot this problem??