[Dnsmasq-discuss] DHCP options, in particular setting default route

JD jd1008 at gmail.com
Fri Aug 21 06:09:46 BST 2009



On 08/20/2009 05:32 PM, Carlos Carvalho wrote:
> JD (jd1008 at gmail.com) wrote on 20 August 2009 15:01:
>   >
>   >On 08/20/2009 02:43 PM, Carlos Carvalho wrote:
>   >>  Chris G (cl at isbd.net) wrote on 14 August 2009 11:03:
>   >>    >I'm pretty sure dnsmasq can do what I want but I'd just like to
>   >>    >confirm the details of how to do it.
>   >>    >
>   >>    >I want dnsmasq to set default routes for DHCP clients, so I need to
>   >>    >use --dhcp-option, so far so good.  However the extra bit I'm not
>   >>    >quite clear about is that I want to set different default routes for
>   >>    >different clients.
>   >>    >
>   >>    >So I need something like:-
>   >>    >
>   >>    >      --dhcp-option =<network id>,option:router, 192.168.1.1
>   >>    >
>   >>    >for each client (or list of clients given by the network id) that
>   >>    >needs to use default route 192.168.1.1.
>   >>    >
>   >>    >What I'm not quite clear about is what the network id looks like
>   >>    >and/or if I need to set it myself using other dnsmasq arguments.
>   >>
>   >>  You have to give the netid for the machine in the dhcp-host declaration.
>   >>
>   >>
>   >The network ID can be the MAC address of the machine.
>
> I'm not sure what you mean. The net-id can be set to the mac yes, but
> I think it must be done explicitly in the dhcp-host declaration; the
> manual doesn't say it defaults to the mac if omitted. I'd rather use
> something easier to recognize; here I set it to the hostname.
Well and good - I assumed Chris already knew
"it must be done explicitly in the dhcp-host declaration".

Also, I did not say it cannot be something like the hostname -
I only stated what it can be, and not what it MUST be.

Cheers,

JD




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