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WINS Name resolution delays

Posted on 2006-10-19
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Last Modified: 2008-02-01
I am currently experiencing name resolution delays on my network. They only occur using the netbios name i.e ping server1 will take about 20 seconds to resolve the name, response time is < 1ms, but it works fine using the fqdn. My setup is as follows:

Wins server1: 10.179.129.60 (Win2k Box)
Wins server2: 10.179.129.65 (WinNT Box)
DC1: 10.179.129.50
DC2: 10.179.129.51
Default Gateway 10.179.129.1

DHCP scope for clients is 10.179.128.50 -254

Now the strange thing is that WINS resolution seems to work fine from the 129 subnet for all servers on that subnet but if I add my laptop to that subnet with a static ip the WINS problem still occurs, i.e. it takes a good 20 seconds to resolve a name if I pin DC1.

Furthermore there are some clients on the 128 subnet that can still ping servers on the 129 subnet quite happily i.e. <1ms response time. I have tried to plug my laptop into these ports just in case there was some random port thing going on in the switches but it didnt work.

So far I have restarted both the WINS servers (DC's were recently bounced but I cant see why they would be the prob anyway) with no luck.

Looking in ethereal I can see the requests going out to the WINS servers but no response coming back until the 4th time the request is made, which then gets a response.

Note that the network was working fine last night and this morning was when the problems were first noticed. There were no changes made to any of the servers / network last night.

Looking forward to your responses.

GCM.
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Question by:geoffcashmoney
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by:Cerebellum
ID: 17766073
First check that your wins-settings are correct both in dhcp and those set with static ip. IPCONFIG /ALL at the clients will tell you the actual settings.
Next check that the queried names actually exists in the wins-server(s).
Check that replication between wins-servers work as expected, and that none of them have problems like a full disk etc. Check event viewer for any clues.

The following gives a quick basic insight in the way wins try to do its job, and you might find some more inspiration here:
http://www.measureup.com/testobjects/MS_TCPIP4/5a8d7ca.htm

Regards from Norway,
Leif Henriksen
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by:geoffcashmoney
ID: 17766343
Thanks for your reply Leif. All wins settings in DHCP are correct as well as any statics being correct.

The names that I am trying to resolve all have correct entries in the WINS database and WINS replication is working according to the event viewer. The only errors that I can see are Winsock Send could not send all the bytes. Connection could have been aborted by the remote client, which when I googled it doesnt seem to be related.

Thanks for the article but it doesnt really help in this case. The major strange problem here is that computers on the .29 subnet still work and SOME computers on the .28 subnet still work.

Something else that might be of use is that the WINS servers are on 1 domain while the .28 and .29 computers are on another domain however all trusts are set up correctly and everything has been working fine for a number of months.

GCM
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by:geoffcashmoney
ID: 17766954
Solved my own problem. For those interested I needed to add an entry in group policy to my DNS Suffix Search list. There were 2 there already for 2 old domains but none for our new domain. Im not sure why this wasnt causing a problem before but it seems to have fixed it for now.

Im not sure how to delete this question so can a Mod please take the appropriate action.

Cheers

GCM
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DarthMod earned 0 total points
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Closed, 250 points refunded.
DarthMod
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