topic How do I make imx6qsabresd into a DHCP server in i.MX Processors

How do I make imx6qsabresd into a DHCP server

tfarnham — Wed, 02 Sep 2015 20:56:21 GMT

I'm having difficulty getting the sabre board to be a DHCP server for my network.

Within my own layer using the Yocto framework:

I have created a dhcp_%.bbappend

I have my own dhcpd.conf

I have my own default-server file

I have validated that the created image does in fact include my versions of these files.

When I boot the image, I see the message:

Starting DHCP server: No state is present for card imxhdmisoc

I must be missing something, or have the files configured incorrectly. I am hoping someone has the proper setup steps for configuration, or possibly knows how I might go about troubleshooting the startup issue.

Thanks,

Terry Farnham

Re: How do I make imx6qsabresd into a DHCP server

b36401 — Thu, 03 Sep 2015 14:27:53 GMT

Actually "No state is present for card" is not a error message. It is just a minor warning.

So please check if DHCP server is up and repliing the requests.

Have a great day,

Victor

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Re: How do I make imx6qsabresd into a DHCP server

tfarnham — Fri, 04 Sep 2015 14:54:48 GMT

I agree, the warning that appears seems to be unrelated as well. I have been able to verify that I can successfully run the dhcpd daemon. I do, however, have something incorrectly configured. I'm guessing my dhcpd.conf file has something wrong. My windows box issues the error upon dhcp renewal:

"An error occurred while renewing interface Ethernet : The parameter is incorrect."

However, the adapters are seeing the "foobar.com" DNS suffix

Here is my dhcpd.conf - maybe someone with better understanding can help me locate the problem.

---------------------

default-lease-time 600; # 10 minutes

max-lease-time 7200; # 2 hours

option domain-name "foobar.com";

option domain-name-servers 10.0.0.1, 10.0.0.2;

option broadcast-address 10.0.0.255;

option routers 0.0.0.254;

option subnet-mask 255.255.255.0;

subnet 10.0.0.0 netmask 255.255.255.0

{

range 10.0.0.10 10.0.0.20;

range 10.0.0.100 10.0.0.200;

}

Re: How do I make imx6qsabresd into a DHCP server

tfarnham — Fri, 04 Sep 2015 15:14:53 GMT

I figured out my typo shortly after I posted:

option routers 10.0.0.254;

However, I am still having difficulty getting the dhcp-server to actually startup properly at boot time. I always seem to have to manually start it after boot up and login.

Terry

Re: How do I make imx6qsabresd into a DHCP server

tfarnham — Thu, 17 Sep 2015 16:32:26 GMT

Added the following to my eth0 interface:

post-up /etc/init.d/dhcp-server start

pre-down /etc/init.d/dhcp-server stop

which fixes the automatic start/stop of the dhcp server.