help me explain

Cuttler, Brian R (HEALTH) brian.cuttler at health.ny.gov
Fri Oct 21 15:32:06 UTC 2016


Simon,

Perhaps a stupid follow up, but the "zone" declarations.

I just need one for the cms.wadsworth.org, nuke all of the cms<vlannumber>.wadsworth.org ones.

What about the ones I'd created for the Reverse zones, are those needed at all?

Thank you,
Brian

> -----Original Message-----
> From: dhcp-users [mailto:dhcp-users-bounces at lists.isc.org] On Behalf Of
> Simon Hobson
> Sent: Monday, October 17, 2016 4:14 PM
> To: Users of ISC DHCP <dhcp-users at lists.isc.org>
> Subject: Re: help me explain
> 
> ATTENTION: This email came from an external source. Do not open
> attachments or click on links from unknown senders or unexpected emails.
> 
> 
> "Cuttler, Brian R (HEALTH)" <brian.cuttler at health.ny.gov> wrote:
> 
> > So my DHCP config looks like this - with one such stanza per building
> floor.
> >
> > I am not certain how to implement this addressing structure with a
> > single domain name
> 
> The domain name is irrelevant - it does NOT affect your addressing
> structure
> 
> > Do we simply put the 6 subnet statements inside of a GROUP statement and
> move the ddns-domainname and ddns-rev-domainname statements into the outer
> structure?
> 
> That's one way to do it, or you can just use the same domain name
> statement in each one. YOu can omit ddns-rev-domainname as it works out of
> the box with defaults - you only need to specify it if doing things like
> bodging around doing dynamic DNS on a reverse zone that's not on a /24
> boundary.
> 
> 
> subnet 10.57.46.0 netmask 255.255.255.0 {
>      ddns-domainname = "dai.wadsworth.org"; ...
> }
> 
> subnet 10.57.47.0 netmask 255.255.255.0 {
>      ddns-domainname = "dai.wadsworth.org"; ...
> }
> 
> subnet 10.57.48.0 netmask 255.255.255.0 {
>      ddns-domainname = "dai.wadsworth.org"; ...
> }
> 
> and so on
> 
> it really is that simple !
> 
> 
> BTW - you have a few redundancies in your config :
> 
>       option domain-name-servers admin.wadsworth.org,
> bionsc.wadsworth.org, ldap1.wadsworth.org, 10.50.156.21;
>        pool {
>              range 10.57.46.30  10.57.46.225;
>              allow unknown-clients;
>              allow known-clients;
>              option domain-name-servers admin.wadsworth.org,
> bionsc.wadsworth.org, ldap1.wadsworth.org, 10.50.156.21;
> 
> You've duplicated domain-name-servers and your allow statements (unless
> you have something at a higher inheritance level to override) simply
> implement the defaults.
> 
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