Solved

Network Connectivity Stops Randomly To Our Windows 2008 Server - But Not For All Clients

Posted on 2010-09-15
7
324 Views
Last Modified: 2013-12-23
Dear Experts,

I have a wierd problems that I am hoping that you can help me with.

We have approx 500 Windows XP clients in our offices connected to our Windows 20008 R2 domain. There is a member server also running Windows 2008 (not R2) with our MIS system running on SQL 2008 R2.

Frequently, perhaps 7 or 8 times a day, different users will complain that they have lost connectivity to the MIS, and that they cannot access any information.

When I visit the user, I can see that the member server itself cannot be pinged until I reboot or refresh the network connection (ipconfig /release, ipconfig /renew).

What makes this particularly strange is, the other computers in the office are still accessing that MIS server fine and pings are successful.

Minutes later, a completely different user would complain about the same problem, and yet everyone else is working fine.

Any help would be greatly appreciated. This is causing real frustration.

Many Thanks
0
Comment
Question by:andymellor
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
7 Comments
 
LVL 7

Expert Comment

by:Anglo
ID: 33680453
Try flushing the users arp table and ping again.  Do you have multiple interfaces on the MIS server?  There may be some issue with teaming and mac addresses.
0
 
LVL 2

Expert Comment

by:JumboGeek
ID: 33680471
Do you have any firewall software on the clients, have you tried disabling the advanced firewall on the dc to narrow the issue down?
0
 
LVL 16

Expert Comment

by:InteraX
ID: 33680506
Have you tried looking in the event log for any clues.
Also have you tried updating their group policy? gpupdate /force
0
Building an interactive eFuture classroom

Watch and learn how ATEN provided a total control system solution including seamless switching matrix switch, HDBaseT extenders, PDU, lighting control to build an interactive eFuture classroom.

 

Author Comment

by:andymellor
ID: 33680586
Clearing the ARP cache on the server seems to work. What causes this? Should it be routine thing that needs to be done?

There isn't any Firewall software on the clients at present.

There isn't any reference to anything remote related in the event viewer. I have tried running GPUPDATE /Force a few times.

Cheers
0
 
LVL 7

Expert Comment

by:Anglo
ID: 33680998
Should normally not be a problem as the ARP entries should time out.  Do an ipconfig /all on a user that has a problem and see when the DCHP lease was obtained.
0
 
LVL 59

Expert Comment

by:Darius Ghassem
ID: 33681919
Run through this link.

http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Server/Windows_Server_2008/Q_26176031.html

Make sure you remove any AV installed on this system for testing
0
 

Accepted Solution

by:
andymellor earned 0 total points
ID: 33807529
Found the issue. It was a problem with the core switch that upgrading the firmware sorted out.

Many thanks for the suggestions etc
0

Featured Post

Ransomware-A Revenue Bonanza for Service Providers

Ransomware – malware that gets on your customers’ computers, encrypts their data, and extorts a hefty ransom for the decryption keys – is a surging new threat.  The purpose of this eBook is to educate the reader about ransomware attacks.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Background Information Recently I have fixed file server permission issues for one of my client. The client has 1800 users and one Windows Server 2008 R2 domain joined file server with 12 TB of data, 250+ shared folders and the folder structure i…
In this article we will get to know that how can we recover deleted data if it happens accidently. We really can recover deleted rows if we know the time when data is deleted by using the transaction log.
This tutorial will walk an individual through locating and launching the BEUtility application to properly change the service account username and\or password in situation where it may be necessary or where the password has been inadvertently change…
This tutorial will walk an individual through the steps necessary to enable the VMware\Hyper-V licensed feature of Backup Exec 2012. In addition, how to add a VMware server and configure a backup job. The first step is to acquire the necessary licen…

751 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question