[Dnsmasq-discuss] Two DNSMasqs on a LAN

[Simon Kelley]

Richard Bailey wrote:
> Hello, first of all, great program here, it really is (almost) 
> everything a small LAN would need.
> 
> I have DNSMasq running on my file server also handling DHCP. My OpenWRT 
> router also has DNSMasq running, so I've set two DNS servers in the dhcp 
> configuration to send to clients. Is there a way for the second DNSMasq, 
> i.e. the one that is not handling DHCP, to be aware of the dhcp leases 
> done by the first? This would be handy if the first were down for a 
> short time, other clients on the LAN would still be able to resolve each 
> other's addresses.
> 

Dnsmasq can be configured to run a command whenever a DHCP lease is 
created/expires/changes, so you could probably script something to copy 
that data into an /etc/hosts format file on the other machine, and have 
the dnsmasq instance there read that.

Cheers,

Simon.