how to debug dhcp?

dragoran dragoran at feuerpokemon.de
Wed Jul 19 07:11:03 UTC 2006


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.
>>
>>   
> used ethreal an have not found anything that looks like an error...
>

this is what I get in /var/log/messages:
Jul 19 09:08:39 chello062178124144 dhclient: DHCPDISCOVER on eth0 to 
255.255.255.255 port 67 interval 6
Jul 19 09:08:45 chello062178124144 dhclient: DHCPDISCOVER on eth0 to 
255.255.255.255 port 67 interval 9
Jul 19 09:08:54 chello062178124144 dhclient: DHCPDISCOVER on eth0 to 
255.255.255.255 port 67 interval 10
Jul 19 09:09:04 chello062178124144 dhclient: DHCPDISCOVER on eth0 to 
255.255.255.255 port 67 interval 12
Jul 19 09:09:16 chello062178124144 dhclient: DHCPDISCOVER on eth0 to 
255.255.255.255 port 67 interval 19
Jul 19 09:09:35 chello062178124144 dhclient: DHCPDISCOVER on eth0 to 
255.255.255.255 port 67 interval 5
Jul 19 09:09:40 chello062178124144 dhclient: No DHCPOFFERS received.

wtf?
who is broken here? should I fill a bug?




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