TCP/IP

I have been updating this blog post over the years since I first discovered the issue with my computer in Windows Vista, now I am on Windows 8 and also on |FTTC broadband; |Path MTU Discovery seems to just work. I have tested the process so the approach and the commands still work in Windows 8, I however no longer need to use this process personally. For some reason that has escaped me |Path MTU Discovery (PMTUD) in Windows just doesn’t seem to figure out the MTU for a given path (something to do with routers being poorly configured to not respond to ICMP requests)....

I have done this a couple of times at the request of BT and NTL engineers when internet connections haven’t been working as expected: netsh int ip reset [log_file_name] Very useful if you a struggling to figure out why you can’t even ping 127.0.0.1.