[Dnsmasq-discuss] DHCP not working for netmask 255.255.0.0?

[A C]

Well, it seems to start up normally.  It just never seems to get a DHCP
request.  There's nothing in the logs after the initial startup
messages (like loading /etc/ethers).  As soon as I revert the netmask
on the router to 255.255.255.0 everything starts working again.

Here's the log:

Jun 12 17:39:56 dnsmasq[2504]: exiting on receipt of SIGTERM
Jun 12 17:40:04 dnsmasq[2748]: started, version 2.35 cachesize 150
Jun 12 17:40:04 dnsmasq[2748]: compile time options: IPv6 GNU-getopt ISC-leasefile no-DBus no-I18N
Jun 12 17:40:04  dnsmasq[2748]: DHCP, IP range 10.0.0.100 -- 10.0.0.110, lease time 1d
Jun 12 17:40:04 dnsmasq[2748]: using local addresses only for domain domain.local
Jun 12 17:40:04 dnsmasq[2748]: reading /etc/resolv.conf
Jun 12 17:40:04 dnsmasq[2748]: using nameserver <ip.address>#53x
Jun 12 17:40:04 dnsmasq[2748]: using nameserver <ip address>#53
Jun 12 17:40:04 10.0.0.253 dnsmasq[2748]: using local addresses only for domain domain.local
Jun 12 17:40:04 10.0.0.253 dnsmasq[2748]: read /etc/hosts - 19 addresses
Jun 12 17:40:04 10.0.0.253 dnsmasq[2748]: read /etc/ethers - 3 addresses


After that it just sits there and never sees anything until I reconfigure the netmask back to a class C.

> From: rune.kock at gmail.com
> Date: Sat, 13 Jun 2009 03:00:59 +0200
> Subject: Re: [Dnsmasq-discuss] DHCP not working for netmask 255.255.0.0?
> To: agcme at hotmail.com
> CC: dnsmasq-discuss at lists.thekelleys.org.uk
> 
> On Sat, Jun 13, 2009 at 02:45, A C<agcme at hotmail.com> wrote:
> > I was trying to stretch out my internal IP space a bit by switching from a
> > netmask of 255.255.255.0 to 255.255.0.0 so I could divide up services by a
> > larger subnet (servers on 10.0.0.x, IP phones on 10.0.1.x, etc.).  I'm using
> > dnsmasq on a Linksys WRT54G and have been doing so with no problems until I
> > changed the netmask.  As soon as I did that, my one wireless machine would
> > not acquire a lease.  I don't see how dnsmasq could even be related but I
> > thought I'd ask here because that's the only service that was disrupted and
> > the only change I've made to the router in several years.
> 
> What does dnsmasq put into your log file?

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