DHCP server behing Cisco relay

[Hernan Saltiel]

Thanks a lot!
I'm using this configuration now, and is working perfectly.
Best regards,

HeCSa.

On Fri, May 20, 2016 at 11:09 PM, Jeff Wieland <wieland at purdue.edu> wrote:

> On May 20, 2016 4:58:23 PM EDT, Hernan Saltiel <hsaltiel at gmail.com> wrote:
>
>> Hi everybody.
>>
>> Maybe I'm asking something previously answered.
>> I configured my new iscp-dhcp-server (Ubuntu 16.04) to server requests
>> from a network of APs.
>> Those APs are connected to a Cisco switch, having 192.168.120.1/24 as
>> primary address, and a secondary subnet with address 10.0.0.1/16 (yes,
>> 16...). It has relay configured, just to send the dhcp requests to
>> 192.168.120.20, a Windows machine.
>> Today I have a Windows machine connected there, where I use the AP
>> controller software, and TFTPD64, a thin software that works as a DHCP
>> server. I configured there a range (10.0.0.10 -> 10.0.200.200) and
>> everything works well, but it's Windows, then from time to time, I have to
>> reboot the system.
>> This is why I configured the new machine as 192.168.120.40/24, installed
>> isc-dhcp-server package, and configured the following lines on
>> /etc/dhcp/dhcpd.conf:
>>
>> default lease-time 600;
>> max-lease-time 7200;
>>
>> subnet 10.0.0.0 netmask 255.255.0.0 {
>>   range 10.0.0.10 10.0.200.200;
>>   option subnet-mask 255.255.0.0;
>>   option routers 10.0.0.1;
>>   option domain-name-servers 8.8.8.8, 8.8.4.4;
>> }
>>
>> subnet 192.168.120.0 netmask 255.255.255.0 {
>> }
>>
>> When I start the server, I only see it trying to answer requests using
>> network 192.168.120.0, then saying "no free leases", and not serving any
>> 10.0.0.0/16 address.
>>
>> Now I'm living with TFTPD64, but I plan to move that to a better solution.
>> Does anybody know about this configuration? Is there something I'm doing
>> wrong?
>> Thanks a lot in advance, and best regards.
>>
>> --
>> HeCSa
>>
>> ------------------------------
>>
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>> dhcp-users at lists.isc.org
>> https://lists.isc.org/mailman/listinfo/dhcp-users
>>
>>
> Since both networks are on the same wire, I believe that you need to place
> your two subnet statements within a shared-network statement.
> --
> Sent from my Android device with K-9 Mail. Please excuse my brevity.
>
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-- 
HeCSa
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