DHCP server behing Cisco relay

[Hernan Saltiel]

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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/dhcp-users/attachments/20160520/9e96d5e4/attachment.html>