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Unable to PING

Posted on 2013-01-21
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Last Modified: 2013-09-14
I have a few machines that have suddenly stopped being able to ping the default gateway on the network (correct subnet, they are able to ping everything else). I have recently swapped the default gateway router but they did initially work. The first 2 machines i flushed the ARP which appeared to resolve the issue, but the last two machine still wont ping.

Any suggestions
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Question by:chrisryan43
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by:brendanmeyer
ID: 38800772
does the MAC/IP appear in the ARP table at all ?
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Author Comment

by:chrisryan43
ID: 38800867
It does, but strangely i have just looked up the ARP table on a problematic machine. Initially it was correct but i attempted to ping it, received one reply and then the ARP table was wrong.

As far as i am aware there is nothing else on the network with a conflicting IP address (most machines aren't affected by this problem)
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by:brendanmeyer
ID: 38800902
the old router isn't plugged in at all is it?

does the change in the arp table point to a different MAC address for the DG ip? or is it missing?
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Author Comment

by:chrisryan43
ID: 38800936
Its a different MAC address. I have managed to find the vendor for the MAC address which is Murata Manufacturing which doesn't look like any equipment we would own so a little bit confused. I think i might have to wait for the office to be empty, pull out the DG, hopefully receive a PING from the odd device and start pulling out RJ45s!
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Author Comment

by:chrisryan43
ID: 38801145
I have just set up a static ARP to point to that MAC address but now i'm not getting a ping response so either the device is no longer on the network or something else is going on.

Is there any way to set up a static ARP on the domain controller and push that out to all computers?
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brendanmeyer earned 1500 total points
ID: 38803000
you can do it via logon script as on the page here
http://www.windowsreference.com/windows-2000/add-static-routes-on-xp2000-via-win-2003-domain-policy/

though you will have to make a script later to remove the static routes, but that shouldnt be too hard either
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Author Comment

by:chrisryan43
ID: 38804944
Thanks - i was worried you might say something like that! Any suggestions of a clever way for the static route to only apply whilst logged on to the local domain (i have users that take laptops away).

The best i can think of is give them a batch file to run if they have problems when on other networks

Thanks for all your help
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