[Dnsmasq-discuss] dhcpv6 problem with static allocations and "no addresses available"

[Carlos Carvalho]

Albert ARIBAUD (albert.aribaud at free.fr) wrote on Thu, Oct 22, 2015 at 02:33:28PM BRST:
> Hi Carlos,
> 
> Le Thu, 22 Oct 2015 12:50:14 -0200, Carlos Carvalho
> <carlos at fisica.ufpr.br> a écrit :
> 
> > Albert ARIBAUD (albert.aribaud at free.fr) wrote on Thu, Oct 22, 2015 at 03:20:34AM BRST:
> > > Le Wed, 21 Oct 2015 20:18:42 -0200, Carlos Carvalho
> > > <carlos at fisica.ufpr.br> a écrit :
> > > 
> > > > > Maybe there are leases for old UIDS and the static address still the
> > > > > database?
> > > > 
> > > > No, I start dnsmasq without any lease.
> > > 
> > > Just to make sure, as your answer may mean various things: did you
> > > explicitly delete the current leases file while dnsmasq was stopped and
> > > only then start dnsmasq again?
> > 
> > With leasefile-ro nothing is read when the process starts.
> 
> Technically, with --loeasefile-ro, no lease file is read but the
> lease-change script can still produce valid leases on its stdout, and
> these will be taken into account.

Correct.

> Now, I assume you don't use the lease-change script or you have made
> sure it does not output any valid lease.

Yes. In message
Message-ID: <20151021221842.GA25414 at fisica.ufpr.br>
I made sure to not miss any dhcp configuration, and there's no dhcp-script
there. Further, it's not compiled in:

Oct 20 10:01:27 dnsmasq[23897]: started, version 2.74test2 cachesize 500
Oct 20 10:01:27 dnsmasq[23897]: compile time options: IPv6 GNU-getopt no-DBus i18n IDN DHCP DHCPv6 no-scripts TFTP no-conntrack no-ipset auth DNSSEC loop-detect inotify

Additionally, the refusal doesn't happen everytime. Since the current process
started, on the date shown above, there have been no problems. However, the log
I sent before shows that it does happen. If undue refusals appear I have to
restart the process to get the client to boot.