'RRset exists (value dependent)' prerequisite not satisfied (NXRRSET)

[Kevin Darcy]

dhottinger at harrisonburg.k12.va.us wrote:
> I had to replace my DNS server that runs on my internal 10. network.   
> It has 8 virtual interfaces.  I install bind using yum install bind.   
> Version is 9.3.4 running on Fedora Core 6.   I essentially transferred  
> all my named conf files (everything in /var/named/chroot) from my  
> backup server, chowned it all to named group named and cranked up  
> named.  I am running dynamic DNS.  Everything seems ok as far as  
> lookups go.  However, I am seeing quite a bit of this error message in  
> my named.log files: 'RRset exists (value dependent)' prerequisite not  
> satisfied (NXRRSET).  Looked it up, but Im Still not quite sure what  
> it means or how to fix it.  
That's just an informational message. It's telling you that a particular 
entry wasn't added to DNS via Dynamic Update because the Dynamic Update 
request specified that the entry must not already exist, and in fact it 
so happened that the entry already existed.
> DHCP runs on the same server, I am getting  
> these messages there:
>   Unable to add forward map from  
> emac022-mobile4.kes.harrisonburg.k12.va.us to 10.45.10.88: timed out.   
> For different computers and subnets.  Im assuming that is because of  
> the named error.   The old server was running 9.2.x.
>
>   
Don't think it's related.

Something within the Dynamic Update sequence of events is timing out, 
most likely the SOA lookup of 
emac022-mobile4.kes.harrisonburg.k12.va.us. If you do that lookup from 
the command line, what do you get? I don't know if your DHCP software 
would try to do a reverse lookup of 10.45.10.88 in that scenario, but if 
it would, and if your 10.in-addr.arpa namespace is not set up quite 
correctly, it's quite possible that the reverse query would try to 
resolve from the Internet DNS and that is likely to time out.

                                                                         
                     - Kevin