DHCP server to handle hostname.

durwin at mgtsciences.com durwin at mgtsciences.com
Fri Sep 23 20:08:59 UTC 2016

"dhcp-users" <dhcp-users-bounces at lists.isc.org> wrote on 09/23/2016 
12:59:38 AM:

> From: Simon Hobson <dhcp1 at thehobsons.co.uk>
> To: Users of ISC DHCP <dhcp-users at lists.isc.org>
> Date: 09/23/2016 01:00 AM
> Subject: Re: DHCP server to handle hostname.
> Sent by: "dhcp-users" <dhcp-users-bounces at lists.isc.org>
> durwin at mgtsciences.com wrote:
> > I have some embedded devices with minimal OS.  I am not sure the 
> DHCP client has compiled ability to send hostname.  I have seen this
> used while searching for help on this subject. 
> > 
> > host e2rb_004 { 
> >         option host-name "e2rb_004"; 
> >         ddns-hostname "e2rb_004"; 
> >         hardware ethernet 00:10:60:31:b2:a0; 
> >         fixed-address; 
> > } 
> > 
> > 
> > This does not add the hostname in DNS.
> Are you aware that host statements with fixed addresses don't follow
> the same path as dynamic leases ? SO there is no lease structure 
> generated, and the server never expires it, and so normal DDNS 
> actions don't occur ?
> > update-static-leases on; 
> This will trigger a DDNS insert/update every time the client leases 
> the address. However, because there is no lease for the server to 
> expire, it will never remove the DNS entry.
> If you don't need a static address, I believe you can just omit the 
> fixed-address declaration. The client will then get a dynamic 
> address assignment, and DDNS will work properly (the entries being 
> deleted when teh lease expires).

Thank you for this information.  I will have to consider this.


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