[Dnsmasq-discuss] Serving address range on a different subnet than the interface

[richardvoigt at gmail.com]

The DHCP server has to provide the gateway address.  Before DHCP, the
client has no gateway.  To send DHCPACCEPT, the client has to send a
packet to the DHCP server, and if it isn't in the same subnet, the
gateway must be used.

What I was working toward is what Simon suggested: run a DHCP relay on
the gateway for that subnet.

On Sat, Jun 26, 2010 at 1:22 AM,  <kfriedman at syncadence.com> wrote:
> I get a defautl gateway from upstream say 66.10.20.1.  Your right about the
> gateway being in teh same subnet, but I'm not sure that the DHCP server has
> to be the one to inforce it.
>
> Thanks,
>
> Kirk
>
> -----Original Message-----
> From: "richardvoigt at gmail.com" <richardvoigt at gmail.com>
> Sent: Friday, June 25, 2010 11:13pm
> To: kfriedman at syncadence.com
> Cc: dnsmasq-discuss at lists.thekelleys.org.uk
> Subject: Re: [Dnsmasq-discuss] Serving address range on a different subnet
> than the interface
>
> What would you use for a default gateway for these clients? DHCP has
> to issue them a default gateway in their own block, otherwise they
> can't communicate with the DHCP server to accept the address, and
> normally the address of the dnsmasq server is used for this.
>
> On Fri, Jun 25, 2010 at 9:41 PM, <kfriedman at syncadence.com> wrote:
>> Hello,
>>
>> I'm trying to emulate a behavior found on dhcpd running on linux 2.6.28
>>
>> I have an interface eth0 with IP 192.168.13.100/24.
>> I want to serve out one or more IPs on a different subnet, say a range of
>> 66.10.20.100 to 66.10.20.200 from eth0
>> I want to avoid having to burn an 66.10.20.x address by adding it to eth0
>> with some "ip addr add"
>>
>> Any ideas?
>>
>> Thanks,
>>
>> KF
>>
>>
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>>
>>
>