[Dnsmasq-discuss] Serving an alias interface with bootp?

[Sorin Panca]

Anssi Saari wrote:
> Hello,

Hello!

> I'm running dnsmasq on a Linksys WRT54GS (OpenWRT distribution). It works
> fine for serving dhcp addresses for wireless clients, but I'd also like
> to serve my old ADSL box with bootp and tftpd, since its flash isn't
> working any more. Right now the ADSL box boots from my desktop PC, but if
> there's a power outage and the PC isn't on, then the ADSL box won't start.
> 
> The WRT54GS is configured so that interface br0:0 is the one where the
> bootp requests should come in. That interface has a fixed IP address,
> 10.0.0.6 and the ADSL box is 10.0.0.7.
> 
> I've tried to config this with
> interface=br0:0
> dhcp-host=xx:xx:xx:xx:xx:xx,10.0.0.7
> dhcp-boot=file,host,ip
> 
> but when the ADSL box tries to boot, nothing happens.
> listen-address=10.0.0.6 doesn't work either. However, if I add
> interface=br0, then dnsmasq sees the requests, but with this config just

Maybe it's the problem with aliases again?

> says "no address range available for DHCP request via br0". But, in normal
> operation br0 gets a public IP address with DHCP, so I can't very well
> serve the ADSL box with that interface.
> 
> So, any suggestions? Traditional bootpd just gives an IP address to
> a MAC address it knows and doesn't care about interfaces and their IP
> addresses. Is there any way I could make dnsmasq behave that way too?
>