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lookup zones showing users with same ip

By mgilmore ·
hello,
to start, i just came into this company, after researching their configurations i have noticed there are 6 instances of multiple ip's in my forward and reverse lookup zones, however they are not all the same in the forward and reverse zones, i then checked the leases in dhcp and it shows no duplicate addresses handed out(lease is set at 8 days), i know that 2 machines with same mac address could cause this but can not believe it would be 6, i have also set conflict detection to 1(new change), my scope is set to 192.168.2.50-150 and i have only about 70 users, i know dhcp will not hand out the same address and i have plenty to spare, i have some users say they lose connectivity at random points in the day, i am sure ip conflict is causing this, thanks in advance for any recommendations,

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by CG IT In reply to lookup zones showing use ...

Don't really understand the problem. there can be a listing of A records for a host in DNS in that those records do show different IP to name mapping. Chances are some of those records are stale and you need to be scavange DNS for stale records to get rid of them. Try that first.

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by mgilmore In reply to

thank you, i have been deleting the ones that are stale, just was not sure if they were supposed to be there, if i have any other questions i will repost, mike

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by Nico Baggus In reply to lookup zones showing use ...

DNS has nothing to do with IP connectivity. If
you have dropping connections you have to look
at other things. Besides an address conflict
will show a popup on the monitor of the user..

DNS is just a little help for us humans. We are
good in names and worse with numbers. And if a
PC registers its name to number translation into
a NDS server you also need to remove it once the
PC is turned off. If that is not done that
multiple records will all point to the same IP
address, nothing bad here.
(This is done many times to have one Web server
host multiple virtual websites.)
IF you are troubled by the names then have all
old names removed regularly.


Kind regards,
Nico Baggus

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by mgilmore In reply to

yea thats what i kinda figured, as for the dropping of network connectivity, a guy set up a wireless router instead of a wireless switch and was not logging in with correct credentials to access the domain(he told me dropping connection)thanks for the post, mike

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by jmgarvin In reply to lookup zones showing use ...

Refresh your DNS records. A quick scan of the network will also help show what is going on....

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by mgilmore In reply to

thanks for the post, yours and others have been helpful, i just dont like seeing the multiple wks with same ip's and as for as for the dropping of network connectivity, a guy set up a wireless router instead of a wireless switch and was not logging in with correct credentials to access the domain(he told me dropping connection)thanks, mike

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by mgilmore In reply to lookup zones showing use ...

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