dhclient complains Can't update forward map no such RRset

Glenn Satchell Glenn.Satchell at uniq.com.au
Mon Mar 27 00:08:20 UTC 2006

>From: "Noah" <admin2 at enabled.com>
>To: dhcp-users at isc.org
>Subject: Re: dhclient complains Can't update forward map no such RRset
>Date: Sun, 26 Mar 2006 16:02:59 -0800
>On Mon, 27 Mar 2006 10:46:30 +1100 (EST), Glenn Satchell wrote
>> Hi Noah,
>> dhclient is the *client* side of dhcp, that is, the part that 
>> requests an adddress from a server, and configures an ethernet interface.
>> dhcpd is the *server* that hands out the addresses, and usually is 
>> the bit that adds things to DNS via dynamic updates.
>> There is a very good section in the dhcpd.conf man page on setting up
>> dynamic dns. It includes the sections of the config files for
>> dhcpd.conf and named.conf that you need to add. If you follow the
>> examples I am sure you will be able to get it working.
>Thank you for your explanation and inspiration, and I followed the directions
>and I am still left with the error.
>--- snip ---
>Mar 26 16:00:15 protect1 dhclient: Can't update forward map
>protect1.domain.com. to no such RRset
>--- snip ---
>what does that error mean?

An RRset is a resource record such as A, PTR, CNAME, MX, etc. The
client is trying to add an A record called protect1.domain.com. with an
IP address of This looks like a name server issue, so
you'll need to turn on debugging for dynamic updates on the dns server
and see what named is complaining about. The BIND Administrator
Reference Manual is online at http://www.isc.org.au/sw/bind (scroll
down to the documentation section towards the bottom of the page).


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