Kevin,
I understand. Let me refocus the question.
DHCP:
I know DHCP will remove the info when the old lease expires, will it remove
this information for me in the case of the device falling off line, and how can
I accelerate that process so that I can reassign the printer tag to a new IP
address.
BIND:
Knowing that I have a "A", "TXT" and "PTR" record, is # nsupdate the correct
mechanism, and how do I specify the commands to remove the "TXT" record as it
is missing column 1 in the tables. I have previously manually both created and
removed forward and reverse records, but text records are different, I just
don't know how different.
The forward table looks like this
hr16038 A 10.57.48.209
TXT "00f8e5793e94da14990f27763448c54a00"
Thank you,
Brian
> -----Original Message-----
> From: bind-users [mailto:bind-users-boun...@lists.isc.org] On Behalf Of
> Darcy Kevin (FCA)
> Sent: Wednesday, February 08, 2017 12:58 PM
> To: Users of ISC DHCP <dhcp-us...@lists.isc.org>; bind-users@lists.isc.org
> Subject: RE: Clean up dynamic names
>
> ATTENTION: This email came from an external source. Do not open
> attachments or click on links from unknown senders or unexpected emails.
>
>
> Honestly, this is like asking for a closet that automatically throws out
> the items you pitch into it, once the items are deemed obsolete or junk.
>
> The DNS database is a repository of information, like a closet, but it has
> no inherent way of knowing the value or currency of the information that
> is put into it. Therefore any "auto-cleaning" mechanism is going to be
> unreliable, at best.
>
> Now, if you want, you can add "metadata" alongside your regular data, or
> in a parallel database, e.g. a timestamp or something like that. You could
> then use that "metadata" to make decisions on what to delete. Various
> layers on top of DNS itself can perform "aging" and "scavenging" in this
> way (Microsoft's solution does this). But that's not perfect either --
> we've had major infrastructure outages due to erroneous scavenging of
> Microsoft-hosted DNS data.
>
> The bottom line is that the processes which read and write data into/out
> of the DNS database are responsible for keeping track of it, evaluating
> it, and getting rid of data that is no longer needed or wanted. This is
> not something the database itself can do.
>
>
> - Kevin
>
>
>
> -----Original Message-----
> From: bind-users [mailto:bind-users-boun...@lists.isc.org] On Behalf Of
> Cuttler, Brian R (HEALTH)
> Sent: Wednesday, February 08, 2017 11:59 AM
> To: Users of ISC DHCP; bind-users@lists.isc.org
> Subject: Clean up dynamic names
>
> Hello Bind and DHCP users,
>
> Sorry for the post to both lists, but it is a dynamic DNS question and I'm
> not sure where the answer will come from.
>
> We replaced the network card in a printer, which had been working, we had
> a DHCP lease, we had created from DHCP a dynamic DNS forward and reverse
> record for the printer.
>
> The new network card was configured to provide the same HOSTNAME
> information as the old card, we do this because the printers now carry
> network names that reflect their inventory tags.
>
> I need the cleanest/best way to remove the old DNS records so that the
> DHCP server will be able to register the IP information in DNS.
>
> Needless to say the TXT fingerprint information for the two network cards
> is different, so automatic cleanup, which would say, allow us to rename
> the printer if needing the same network card, will not work.
>
> I suspect that # nsupdate removing the A, TXT and PTR records is the way
> to go, but hope for a quicker, less error prone method.
>
> Thanks in advance,
> Brian
>
>
>
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