[Dnsmasq-discuss] VLANs and multiple IP addresses for one mac address

[David Joslin]

On 26 June 2014 12:45, Albert ARIBAUD <albert.aribaud at free.fr> wrote:

> Bonjour David,
>
> >
> > ​Here's the configuration for the DHCP range used on one VLAN (on
> interface
> > br1).
> >   interface=br1
> >   dhcp-range=tag:br1,10.10.20.101,10.10.20.200,255.255.255.0,1440m
> >   dhcp-option=tag:br1,3,10.10.20.1​
> >
> > ​Here's the configuration for a couple of hosts on that VLAN.
> >   dhcp-host=60:03:08:9D:3D:08,10.10.20.99
> >   dhcp-host=F0:CB:A1:86:D1:6E,10.10.20.100​
>
> You're using 'tag:' in both dhcp-range and dhcp-host; I believe you
> should use 'set:' in dhcp-range with a different tag for each vlan, and
> 'tag:' in dhcp-host.
>

​Thanks Albert.

According to the man page, dnsmasq only allows you to ​'set' tags on
dhcp-host lines. It doesn't allow you to match tags like you can on
dhcp-range lines. This is what's confusing me. I know the tag matching
option works when I use it with 'dhcp-range' but it doesn't appear it can
be used with 'dhcp-host'. If it could I think my problem would be solved.

Maybe I'm still missing something!

David


>
> > What I thought Simon was suggesting was to allocate specific static
> > addresses to the access points that are outside the ranges that are
> > allocated to other clients. This would avoid the problem of dnsmasq
> > allocating addresses to other clients that had already been allocated to
> > the access points. What I'm missing here is how to reserve several
> > addresses for a particular access point when all the requests use the
> same
> > mac address. The requests will arrive on different interfaces (br0, br1,
> > br2 etc) but I can't see how to use that in the dhcp-host configuration.
> > That's why I think I'm missing something!
> >
> > Thanks for your help.
> >
> > David
>
> Amicalement,
> --
> Albert.
>
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