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PC's slow after domain controller replaced

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Last Modified: 2012-06-27
I've replaced a domain controller for a client of mine. This is the only server they have.

Here are the roles I transferred over to the new box: dns, dhcp, dc, gc, pdc, pid, schema master, domain naming master, infrastructure, etc.

Since I've made the move and powered off the ORIGINAL domain controller, the users are running rather slow. Logging into the PC takes forever (even tho I have DNS on the machine pointed to the server). The machines are generally just running slow, as if they are looking to the old server for some reason.

What am I missing? What information can I provide to help out?

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I encountered similar issues when our network switch was dying.  I replaced the switch and the logon process worked so much faster!  Another potential is to run ipconfig /flushdns.
AwinishSenior Solution Architect

Commented:
Consider one machine first,

Important, user machine should point their preferred dns server to your new server.
Secondly check the connectivity & process utilization on one machine.
Check ping is continous w/o any drop means RTO should not be there.
GC has been configured with universal group membership cachig enabled.
Name resloution is working fine using nslookup.

Lastly check for virus issue.
There can be n no of issue for slow logon.
You have to troubleshoot & segregate the issue.
If users are using roaming profile,whats the size of their profile?
How much CPU utilization is reaching.


Author

Commented:
Hi,

Here is the error I recieve when doing an NSLOOKUP from the problem PC:

C:\Documents and Settings\pam>nslookup
*** Can't find server name for address 192.168.1.250: Non-existent domain
*** Default servers are not available
Default Server:  UnKnown
Address:  192.168.1.250


How do I resolve that? perhaps that's my issue?
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Commented:
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Bill CochranDeveloper/Analyst

Commented:
I assume 192.168.1.250 is your new domain controller ip address?  Can you give me more specifics.  When you say slow, do you mean primiarily for surfing and using network resources....fast opening local files?  Have you reviewed the event viewer logs on the client and the server?

Author

Commented:
Awinish, you are a smart man!

It was indeed missing the reverse lookup zone ip subnet! I've added it, and can do a proper "nslookup" from a client PC. Login time was much much faster. I am calling her and having her test the system now!

Will keep you updated :) Thank you so much!

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