[Dnsmasq-discuss] DNSMASQ wrong addresses allocated after changing DHCP Clients between Neutron vRouters

Luis Kleber luis.kleber at gmail.com
Thu Dec 6 14:47:56 GMT 2018


Last days I install 2 servers, one with Centos7 and other with Debian8,
without Openstack/Neutron. Both with the same DNSMASQ config I originally
posted.
On both I was using version 2.76 and upgraded to 2.78, using the same
ethernet interface changing the IP address between 100.97.97.1/24 and
100.98.98.1/24, and everything works as expected. I also tested with 2
different interfaces ont each case and also worked fine.
The DHCP client always was the same in all cases (Debian8, Centos7, and
Centos7 with Neutron).

It seems that the problem only happens when using DNSMAQ with Neutron
routers.
How debug it better within Neutron?  Another cache table, or how see more
detailed debug infos?

Thanks
--
Luis  Kleber


Em sex, 30 de nov de 2018 às 19:07, Luis Kleber <luis.kleber at gmail.com>
escreveu:

> Hi Stappers!
>
> No hardfeelings! There was only a question missing! :)
> Thanks for your reply and yes,  it's a complex setup because of the
> Neutron use (all installation needed).
>
> After explained the problem, I was expecting a help to "how better debug",
> how see some other logs, activate another debug, another configuration, and
> so on...
> I'll try if the same problem happens without Neutron. Only using a DNSMASQ
> with 2 different access interfaces/networks.
>
> Tanks.
> --
> Luis Kleber
>
>
> Em sex, 30 de nov de 2018 às 16:33, Geert Stappers <stappers at stappers.nl>
> escreveu:
>
>> On Wed, Nov 28, 2018 at 08:49:57AM -0200, Luis Kleber wrote:
>> > Em ter, 27 de nov de 2018 às 20:12, Geert Stappers escreveu:
>> > > On Mon, Nov 26, 2018 at 04:42:05PM -0200, Luis Kleber wrote:
>> > >     <snip/>
>> > > > dhcp-range=set:infra-70-subnet,100.101.1.11,100.101.1.64,600s
>> > > > dhcp-option=tag:infra-70-subnet,3,100.101.1.1
>> > > > dhcp-range=set:infra-71-subnet,100.101.2.11,100.101.2.64,600s
>> > > > dhcp-option=tag:infra-71-subnet,3,100.101.2.1
>> > > > dhcp-range=set:infra-72-subnet,100.98.98.11,100.98.98.64,600s
>> > > > dhcp-option=tag:infra-72-subnet,3,100.98.98.1
>> > >     <snip> infra-73 ... infra-92 </snip>
>> > > > dhcp-range=set:infra-93-subnet,100.103.8.11,100.103.8.64,600s
>> > > > dhcp-option=tag:infra-93-subnet,3,100.103.8.1
>> > > > dhcp-range=set:infra-94-subnet,100.104.1.11,100.104.1.64,600s
>> > > > dhcp-option=tag:infra-94-subnet,3,100.104.1.1
>> > > > dhcp-range=set:infra-95-subnet,100.96.96.11,100.96.96.64,600s
>> > > > dhcp-option=tag:infra-95-subnet,3,100.96.96.1
>> > >
>> > > Why?
>> > >
>> >
>> > "Why" what?
>> > If the question is the all other dhcp-ranges (unused for this scenario),
>> > the answer is because in production case these other networks for each
>> dhcp
>> > range exist. These other unused ranges for this test case, this cannot
>> be a
>> > problem.
>> >
>> > Thanks
>>
>> No problem, no hardfeelings.
>>
>> It was me who should have wrote in his initial reply
>>
>>
>>   Oops, that is a complex setup. Is really all the complexity needed?
>>
>>
>> Anyway: Feel free to post, do known that it is been readed.
>>
>>
>> Groeten
>> Geert Stappers
>> --
>> > this cannot be a problem.
>>
>> _______________________________________________
>> Dnsmasq-discuss mailing list
>> Dnsmasq-discuss at lists.thekelleys.org.uk
>> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
>>
>
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