Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

On a FreeBSD computer

  • Is there a DHCP client log that I could use to debug a DHCP issue?
  • Can I set a debug param to get more information from the dhclient?

I found a lead on this article handy tools for debugging DHCP on linux but that's on Linux (dhcping, dhcpdump), and I don't have these on my FreeBSD, I won't be able to install them.

$ tcpdump -lenx -i eth0 -s 1500 port bootps
share|improve this question
As state in the freebsd dhclient there is an option to make it less verbose but none to make it more verbose. that's bad luck. freebsd.org/cgi/man.cgi?query=dhclient&sektion=8 – Kiwy Jan 23 '14 at 12:38

From the manpage:

It can be made to emit verbose messages displaying the startup sequence events until it has acquired an address by supplying the -v command line argument.


dhclient -v eth0

...where eth0 is your network interface.

share|improve this answer
-v is not a valid switch on FreeBSD, but thanks. – joël Jan 23 '14 at 11:45

dhcpdump is the tool of your choice.

Just use dhcpdump -i fxp0.

I found more information at http://www.freebsdonline.com/content/view/713/524/

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.