Solved

Cannot ping W2k8 from -one- linux host only.

Posted on 2011-03-25
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Last Modified: 2012-05-11
hi,
we are encountering a very strange phenomenon. We can ping a specific windows server in one of our data centres from any other random server in any of our data centres across the world except from ONE single host among over 600 servers. Even with firewall down, the linux box cannot ping the windows server, but it can traceroute. Furthermore, it can also ping -R (!) , just not ping on its own. Ping from all other linux hosts to that windows machine works perfectly well.
any??? ideas?
cheers -
oz.
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Question by:Ozfingwe
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6 Comments
 

Author Comment

by:Ozfingwe
ID: 35218369
this is allowed. the windows host can be pinged from every other host in our data centres, it is just one single host (linux) that cannot ping the windows server, ping server doesnt work, ping -R works.

cheers -
oz.
0
 
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Expert Comment

by:Darius Ghassem
ID: 35218430
We had the same issue it ended up being a network team on the Windows box. Check to see if you have a network team on the box
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Author Comment

by:Ozfingwe
ID: 35218480
i dont think so - it was working until a couple of hours ago, and there is only one NIC there as well, the windows machine is a guest on a redhat server, but nothing was changed anywhere there.
cheers -
oz.
0
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Expert Comment

by:patkremer
ID: 35222205
Validate that your subnet masks are correct, we've had issues like this before when a subnet is expanded and one host that should be in the same subnet has a /24 and another host has the new /23 mask.
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Accepted Solution

by:
Ozfingwe earned 0 total points
ID: 35243502
eventually, by way of tcpdump on both ends I figured some routing mess was going on, checked the routing tables and voila. nothing to do with the machines themselves.

thanks!

oz.
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Author Closing Comment

by:Ozfingwe
ID: 35308424
had nothing to do with the machines, so hard to say "accurate" solution. the problem was just somewhere else.
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