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

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.

  • 2
    -v is not a valid switch on FreeBSD, but thanks. – zabumba 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/

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