[Dnsmasq-discuss] Multiple MACs and single IP

[richardvoigt at gmail.com]

On Sun, Feb 7, 2010 at 2:30 PM, Simon Kelley <simon at thekelleys.org.uk> wrote:
> David Kovalsky wrote:
>> Hi,
>>
>> I'd like to suggest a feature to dnsmasq for the DHCP functionality.
>> The ability to have same IP address for multiple MAC addresses.
>>
>> My goal is to be able to have same IP for both my wifi and wired
>> connection so I can switch back and forth without losing connections.
>> My setup and more info is described in the openwrt bug tracker:
>> https://dev.openwrt.org/ticket/6205
>>
>> Does this sound interesting to others?
>>
>
>
> It's already supported. The crucial thing to understand is that if
> dnsmasq leases an IP address to MAC-address-1, it can't normally break
> that promise and lease it to MAC-address-2 whilst the lease is valid.
> Hence when MAC-address-2 turns up, it gets a pool address instead.
>
> You can explicitly give dnsmasq permission to break the promise by
> putting both addresses in the _same_ dhcp-host line:
>
> dhcp-host=<MAC-address-1>,<MAC-address-2>,<IP-address>
>
> You probably need to go back to oprnwrt and get them to enhance the GUI
> system to support this.

... and while you were composing your reply, I was making a comment to
that effect on the openwrt bug mentioned by David.

>
> HTH
>
> Simon.
>
>
>
>
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