Re: how to debug dhcp?

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On 19/07/06, David Timms <dtimms@xxxxxxxxxxxxxx> wrote:
dragoran wrote:
> dragoran wrote:
>> John Reiser wrote:
>>>> when I try to use dhcp for my network device (eth0 - forcedeth) it does
>>>> not get an IP with the result: failed
>>>>
>>>
>>>
>>>> 2) how can I debug it to find out what is causing it?
>>>>
>>>
>>> Boot single-user, invoke the dhcp program from a console in "non-daemon"
>>> mode, and watch.
>> how do I do this (found nothing in the man page)
>>>   For dhcpd, consider flags -d -tf and perhaps -play.
>>> Also, consider running under strace.
>> I am talking about dhclient not dhcpd
>>>   For lowest-level packet trouble,
>>> use a program such as tcpdump or ethereal to check what goes over the
>>> wire.

Run the DHCP server using -d and see if you are getting any DHCP
traffic when the client tries to DHCP Discover.

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