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dns help

Posted on 2009-05-13
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Last Modified: 2013-12-02
have  two different subnets 10.1.x.x /16 and 10.2.x.x /16 seperated by a WAN link. My problem is at times of the day subnet  ( 10.2.x.x ) drops it's mapping  commands  therefor  does not see the windows 2003 servers which are in the subnet 10.1.x.x network.  At times it only last a few seconds and never more then a minute.   it happens about twice a day.  the users don't have to reboot the workstations to get back in. but the connection is lost and if a file was open they do loss data if not auto save.  IS this a DNS issues ? It seems like they don't loss getting to the internet.  NOt getting any  event ID logs on the Primary domian controller. If you go the my network place you don't see any servers.  Would like some help if possable. Thanks
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Question by:patrickst
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marine7275 earned 167 total points
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It does not seem to be a DNS issue. It sounds netwrok related. I would try and pull logs on your routers, ISP equipment etc. I would download wireshark (http://www.wireshark.org/) and try some captures to see what is going on.

Another good network monitoring tool is net tools:http://www.axencesoftware.com/index.php?action=NTPro
Its free.
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by:elf_bin
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Agreed, *sounds* like a network issue.  Check your switches error logs for connection drop.  Usually it's the plug (or socket) that's loose or broken.  If you can predict when it'll happen, watch the link light on the node and/or switch.

Hope this helps.
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by:patrickst
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Hey thanks for the info I will  check this out today and let you know.

Pat
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by:bluntTony
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Agree that it's a networking issue rather than DNS. If you're happy with the physical connections, do you use a dynamic routing protocol on the routers, i.e. RIP?

If so, configure the routes statically instead - see if this makes a difference.
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