2008r2 networking grief
Posted on 2011-10-18
Recently I had an issue with a switch loop, even though it was very brief it caused problems for a few servers that started to report duplicate IP addresses without reason.
This was sorted with the "netsh int ip reset" command, well on all but one.
The server I am still struggling with does not report any thing out of the ordinary in its event log but when it communicated with some host outside its own subnet it starts dropping packets in roughly 3 seconds intervals.
So to be brief I have tried to change its IP (it works), same IP on a different server (works), change drivers from Broadcom to inbuilt MS drivers (no change).
Ping from the server to another on the same subnet (works), ping from another server to the server on the same subnet (works).
Ping from another network (packet loss), ping to an external network (packet loss).
And since this issue cam at the same time a the duplicate IP address problems on the other servers we have tried to run "netsh int ip reset" on this one too (no change) and "arpretrycount = 0" as well (no change).
There is also no difference if the server gets its IP statically or dynamically.
And changing the servers IP address (which works) is unfortunately not an option as its in production with a database used by several remote hosts.
Any fresh ideas is much appreciated.