[Dnsmasq-discuss] two dnsmasq servers providing dhcp for one domain

Anand Kameswaran akameswaran at gmail.com
Wed Jul 15 19:47:40 BST 2009

I am maintaining an internal private domain using dnsmasq.  However there
are n number of  subnets connected via infrastructure VPN, and up until now
I have had dnsmasq only on one subnet and it has been succesfully serving
DNS for all subnets.  However I now have a need to add DHCP to those
subnets.  Now I have succesfully setup dnsmasq to serve DHCP to the subnet
it is on.  However on the other side of the VPN, obviously dhcp requests
will not be recieved.
I was thinking I could setup a second dnsmasq instance on the other side of
the VPN, but then each DNSmasq will only know about the DHCP names for the
machines on it's side of the VPN.  I don't think DHCP relay is an option (I
could be wrong - but it is for a rather large number of subnets)
Is there a way to configure the two dnsmasq servers to update and/or querry
each other?  All machines on the subnets share the same domain, so my
understanding is that if dnsmasq doesn't find hostx.domain.com then it will
give up.

Currently the dnsmasq also do forward lookups for external addresses.

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