DHCP server behing Cisco relay

[Jeff Wieland]

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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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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