[Dnsmasq-discuss] Re: DHCP: different IPs for same same MAC

richardvoigt at gmail.com richardvoigt at gmail.com
Tue May 6 05:52:31 BST 2008

On Mon, May 5, 2008 at 3:15 AM, Sven Köhler <skoehler at upb.de> wrote:
> > In dnsmasq, client-ID overrides MAC-Address, and thats the difference
> between the two requests.
> > I was bitten by this when my linux-distro updated the dhcpc, now sending a
> random id, when sending none before...
> >
>  Oh, just one more question:
>  This actually also influence dnsmasq's bahaviour when ther's no
> reservation, right?
>  So assume some friend of mine comes along and i don't have any dhcp-host
> statement for his computer and he boots windows and then reboots to linux
> (and his computer is configured similar to mine), then his computer will get
> two different IPs, right?
>  Can i somehow change the behaviour in that case too?
>  (I mean: changing dnsmasq's default beheviour to: "ignore client-ID")

I think there is an option, since in many environments the client
configuration cannot be trusted.

Look at --dhcp-ignore-names, it doesn't specifically say it ignores
client ID, but it definitely is related.

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