Retransmissions on slow file copy
Posted on 2003-03-13
I'm experiencing a very weird problem with my network.
A network with about 20 NT servers, 2 WINS servers, DHCP for the NT
One server (the primary wins server) has problems with clients with
some ip addresses. If a user complains about a slow network, I can
solve it by disabling that ip address in the dhcp server, and do an
ipconfig/release/renew. But I don't wanna do that for every time this
Now if I take another workstation (doesn't matter which, even tried a
w2k station) and I give it (static) the 'bad' ip address, copying a 1
MB file on that server takes a very long time and sometimes breaks
If I now change the ip address of the workstation to another one and
try to copy the file again it is done in an instant. Copying files on
other servers with either ip address is as fast as it should be.
I've used a sniffer to capture packets to and from the server and I
get a lot of retransmissions, ack too long, window frozen and
nonresponsive station when using one of the 'bad' ip addresses. When
I'm just comparing the dataflow it doesn't differ that much from the
normal flow except that it sometimes takes more than 10 seconds before
another datapacket is sent.
I have absolutely no idea how to solve this. The wins entries are
correct, pinging each way with or without name is fast (<10ms).
Any ideas or suggestions?