[Dnsmasq-discuss] Cannot obtain IP address from dnsmasq

[Matwey V. Kornilov]

2016-06-24 19:19 GMT+03:00 Albert ARIBAUD <albert.aribaud at free.fr>:
> Hi Matwey,
>
> Le Fri, 24 Jun 2016 12:10:53 +0300
> "Matwey V. Kornilov" <matwey.kornilov at gmail.com> a écrit:
>
>> Hello,
>>
>> I am running dnsmasq-2.71 and experiencing the following issue.
>>
>> I have network interface eth3 with 10.3.0.1/24 address assigned to
>> it. I want dnsmasq instance to supply everyone on eth3 L2-segment
>> with IP address from 10.3.0.1/24 subnet. I don't want DHCP be running
>> on other interfaces where it can interfere others.
>>
>> The issue is the following, HP commutator can not obtain address.
>>
>> 12:03:01.609174 IP 192.168.1.1.68 > 255.255.255.255.67: BOOTP/DHCP,
>> Request from 40:a8:f0:6f:64:40, length 256
>> 12:03:23.952477 IP 192.168.1.1.68 > 255.255.255.255.67: BOOTP/DHCP,
>> Request from 40:a8:f0:6f:64:40, length 256
>>
>> At the same time, other devises obtain address successfully:
>>
>> 12:03:45.311101 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP,
>> Request from 44:aa:e8:00:0c:4e, length 249
>> 12:03:45.313634 IP 10.3.0.1.67 > 255.255.255.255.68: BOOTP/DHCP,
>> Reply, length 300
>> 12:03:45.340273 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP,
>> Request from 44:aa:e8:00:0c:4e, length 256
>> 12:03:45.371271 IP 10.3.0.1.67 > 255.255.255.255.68: BOOTP/DHCP,
>> Reply, length 300
>> 12:03:45.395392 IP 10.3.0.33.1025 > 239.255.255.250.1900: UDP, length
>> 320 12:03:46.884261 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP,
>> Request from 44:aa:e8:00:0c:46, length 249
>> 12:03:46.885707 IP 10.3.0.1.67 > 255.255.255.255.68: BOOTP/DHCP,
>> Reply, length 300
>> 12:03:46.911271 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP,
>> Request from 44:aa:e8:00:0c:46, length 256
>> 12:03:46.945596 IP 10.3.0.1.67 > 255.255.255.255.68: BOOTP/DHCP,
>> Reply, length 300
>> 12:03:46.968662 IP 10.3.0.32.1025 > 239.255.255.250.1900: UDP, length
>> 320 12:03:50.390213 IP 10.3.0.33.1025 > 239.255.255.250.1900: UDP,
>> length 320
>>
>> I suppose, that the issue here is that HP's source address is
>> 192.168.1.1, how could I configure dnsmasq to overcome this issue?
>
> The above is a tcpdump log. What does dnsmaq itself log? Think of
> adding the log-dhcp option to the dnsmasq config file beforehand.
>

Nothing about 192.168.1.1 in log-dhcp, unfortunately.

> Amicalement,
> --
> Albert.



-- 
With best regards,
Matwey V. Kornilov
http://blog.matwey.name
xmpp://0x2207@jabber.ru