Same Name with Ping -a

When I do a ping -a x.x.x.101 it returns machine name admin11 and when I do a ping -a x.x.x.102 it returns machine name admin11. I have physically verified that each machine has a different IP (we are using static IP addresses). If I ping admin11 it returns x.x.x.101 and then ping admin12 it returns x.x.x.102.
We have Active Directory installed as well as Solaris and Novell 5 on the network. There is no WINS service running on any server and all workstations do not have WINS addresses. I check DNS entries as well and there is nothing to offer any insight. There are no events in the log files for duplicate names on any of the servers and the workstations do not have issues connecting. DNS is handled via Win2K as well as network authentication.
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TeckWittAsked:
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TeckWittConnect With a Mentor Author Commented:
I found that the reverse DNS was not set to dynamically update and it was not purging old records so many machines had multiple entries in the reverse look up records. Everything is happy.  Thanks for all your help.
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edmonds_robertCommented:
Clear the cache on the DNS server anyway.  (Right click on the server in MMC, and select "Clear Cache").  This won't destroy your active registrations, but those that have been resolved and kept in memory.
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gandalf94305Commented:
Your DNS is not configured properly. DNS mappings consist of two mappings actually: one from the name to the IP address and one the other way around.

You probably have the following:

...101 PTR admin11 (address to name)
...102 PTR admin12 (address to name)

admin11 A ...101 (name to address)
admin12 A ...102 (name to address)

This explains the asymmetric behaviour.

Cheers,
--gandalf.
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