Domain controller unable to dynamically add/update PTR record

Smith, William E. (Bill), Jr. Bill.Smith at
Mon Jan 24 18:04:01 UTC 2005

In our environment, we have allowed Windows domain controllers to
dynamically update their A & PTR records within the Windows only
domains.  I'm currently troubelshooting a problem where a couple DC's
register their A records fine but fail when trying to do their PTR
records.  After sifting through the various server logs, I came across
the following error which I believe is at the core of the problem since
I had a Windows admin do an ipconfig /registerdns on the DC to force it
to re-register its records and noted that this error appeared within
seconds after that attempt.  
update.log:Jan 24 11:45:24.901 info: client
updating zone '': update failed: 'RRset exists (value dependent)'
e not satisfied (NXRRSET)

While it's clear that the problem is related to a prerequisite not being
met, it's not clear to me what exact prerequisite has failed to be
satisifed.  Can anyone shed any light here?  I know this is a common
problem with DHCP clients but DHCP is not involved here.  FWIW, the
primary DNS server where these updates are coming into is a QIP DNS
server.  I'll provide any further info as needed/requested.



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