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The Active Directory is running slow.

By lubomir.diamandiev ·
Hi all.
I have this kind of problem.
I have an Active Directory that controls a small network.
the problem is that the clients logon very slowly.
It costs a 5 mins or something for clients to logon. We are in local network.
I made a sys defragment and clean the unusual files on the main machine but this doesn't solve my problem.
Can Anyone help me with this situation ?
OS: 2000 pro

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Slow AD Login

by BFilmFan In reply to The Active Directory is r ...

My first suspicion is that you either have lots of little group policies being applied or are processing the policies synchronously is taking longer due to an undersized or strained domain controller.

It takes longer to process a large number of small policies than it does one or 2 large ones.

See the MS article on GPO at;en-us;315418&sd=tech for some ideas to fix this.

Now which system did you clean the "unusual files" from? The XP system or the domain controller?

Have you scanned for viruses and malware on ALL the systems including the DC?

Additional thoughts are once you login, does the system reach the DC normally to reference DNS lookups, LDAP queries and the like?

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10x BFilmFan

by lubomir.diamandiev In reply to Slow AD Login

I will read this article.
I did that things to the domain controller.
Everything is normal in the network (ping < 1ms).
The transfer rate is good, but the speed of a browsing shared folders on the network is slow.
Have not run adaware check so far.
I have licensed nod32 with last definitions on the clients.
When I login to a local comuter using local user everything is fine and they are working fast.
Thw link that you gave me is very usefull. I will try to make something with information there.

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Watch your network packets and system load

by stress junkie In reply to The Active Directory is r ...

use a network packet sniffer like Ethereal, available for free at Look for problems with data transmission. Thinks like duplicate acknowledgement packets, packets out of sequence, and other errors, could mean that you have some bad hardware.

Then use the system monitor on the servers to see what resources are being used and if they need more resources. Things like a lot of disk activity could mean a lot of things, such as the operating system swapping too much, or just too many disk related tasks on one machine. If the CPU is running near its maximum then maybe you can divide its workload between two or more computers. If the network cards are running near their maximum load then maybe you need to put a switch into the LAN to keep packets on particular segments. Using a switched hub and putting high volume servers on their own port can help to manage network traffic in such a way as to give you quieter LAN segments. This can have the effect of giving you more bandwidth.

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The Active Directory is running slow.

by chentrappi In reply to The Active Directory is r ...

Try with another nic card .Still if its not working .Try with anther place .againg its coming take it out all strtup apllication from registry,it will work.

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Check DNS

by aisterabadi In reply to The Active Directory is r ...

Make sure the all the clients are pointed to the AD DNS server. Verify the reverse lookup zones are setup for each subnet on your network. Verify when you ping the server you are getting a fully qualified resolution on response.

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