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Windows 2003 Guest Hyper-v PING problem

Hello,
I am running several guest server Windows 2003 and 2008 on a Windows 2008 HYPER-V server, and one of the server (Windows 2003 R2 32bit) as a very strange ping behavur.
It has very irregular PING response time when pinging other devices on the network.
It does a few normal Ping and suddenly is shows 5-6 and sometime more ping response with a high time. The high time ping shows at the command prompt very fast (5 ping in 0.02 of a second) and then back to normal for a few ping and it start again.
Each server on the HYPER-V as is own NIC, and I try to change the NIC used by the server without any success. I try to change to port used on the switch as well with no success.
Does anybody know what I can do? I reinstall as well THE HYPER-V integration services and that does not help and reset the IP stack.
Thank you for your help
Serge

PING.docx
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SMPAR2
Asked:
SMPAR2
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1 Solution
 
storkyIVCommented:
Hello,

What AV / Firewall are you using?
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SMPAR2Author Commented:
ForeFront on all server and workstation and that is the only server who as the problem!
Thank you for your help
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SMPAR2Author Commented:
Sorry no firewall on the server
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storkyIVCommented:
Are any errors on the switch?
One of my hyper-v hosts wouldn't respond to ping and appeared offline, but all guests were reporting fine.
Turned out to be a port config error on our Cisco core switch.
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SMPAR2Author Commented:
I try to change the port on the switch and use on other cable but still the same. When I ping sedently I get 20 responce with TIME=1012 for exemple in 1seconde and then back to normal for a few ping.
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storkyIVCommented:
Have you checked for driver updates for the NIC?
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SMPAR2Author Commented:
I have not updated the driver since it is a NIC carte with 4 entry and all the other server using the carte have no problems. Even when I connected the server to the other onboard NIC (Not same carte) it still has the problem. I think it is software problem!
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SMPAR2Author Commented:
For info user use this server for a Bibliotec software and pictures for a web sites. and they do not have any problem when using it. If you ping the other way (from a PC you ping the server every thing is find)
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storkyIVCommented:
If you ping the server and all is fine but when you ping out from the server there is an issue I would say that was switch problem?
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SMPAR2Author Commented:
I will investigate and see if that is the problem.
I will move the server to an other switch and change the cable again as a test.
I will come back to you with the result.
Thank you for your help
Serge
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SMPAR2Author Commented:
Hello,
I connected the Guest Windows 2003 virtual server having the problem to the onboard NIC card (other physical nic on the hyper-v host) connected the server to an other switch and used a new cat6 cable and still the same problem!!!!
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storkyIVCommented:
Ok, So you have multiple nics - have you tried mapping a different nic to that particular virtual machine?
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SMPAR2Author Commented:
Yes I connected the cable to the onboard NIC (Before it was on an extra multi port NIC), and on the Hyper-Guest map the VM to this other NIC. I connected as well with a new cable to a phisicaly different switch.
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SMPAR2Author Commented:
Thank you all for your help.
I found the solution:
http://techblog.mirabito.net.au/?p=142

CPU sync problem  !!!!
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SMPAR2Author Commented:
Resolve the problem
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