Re: Query on DHCP-to-DNS communications

[Yakov Rekhter <[e-mail]>]

Folks,

> I would like to replace this text in the DHCP FAQ:
> 
> > 11. Can a DHCP client update its DNS entry through DHCP?
> >
> >     No. There has been some discussion about adding this ability to DHCP.
> 
> Here is my draft for the question and answer to replace this:
> 
> > 11. Can a DHCP client or server make a DNS server update the the
> >     client's DNS entry to match the client's dynamically assigned
> >     address?
> >
> >     There is no standard DNS interface to allow a DHCP client or
> >     server to do this, but there are presently efforts to define such
> >     a standard.  In the mean time, there are DNS and DHCP servers
> >     that accomplish this through proprietary means.
> 
> I have written this so as to beg the question as to whether the DNS
> will receive its information from the DHCP server, or from the DHCP
> client.  My questions:
> 
> a) Has my clever phrasing left out a possible method that is receiving
>    consideration?
>    (The DNS server could poll the DHCP server once a second; or the
>     DHCP client could kick the DNS server to ask the DHCP server for
>     the current address; these ideas seem kooky to me, but I mention
>     them because they do show that things could be accomplished in
>     other ways)
> 
> b) Am I right in framing this as a "DNS enhancement"?  I.e., a standard
>    interface will be added to the DNS, then the DHCP developers will
>    implement it.
> 
> c) Is there more specific information that I could add?  E.g. perhaps
>    it is now clear that the communication in question will be between
>    the DHCP server and the DNS server.  (I seem to recall that IBM's
>    solution was to have the client update the name & the server update
>    the address)

There is an Internet Draft that describes DHCP-DNS interaction
(draft-ietf-dhc-dhcp-dns-01.txt).

Yakov.