dhcpd trouble shooting utilities

Patrick Asselman iceblink at seti.nl
Tue Nov 20 08:52:11 UTC 2012

On 2012-11-19 20:36, Gene Heskett wrote:
> Greetings;
> I gave the missus a Nook Color a year ago for Christmas, set it up to
> access my AP here in the house & even bought a book at the time.
> But then, since she uses the crossword generator in it more than 
> anything
> else, I disabled the radio to save on the battery life, which w/o the 
> radio
> can be a couple weeks.
> But, I turned the radio back on, and while the nookcolor does appear 
> to
> negotiate the WPA2-PSK password stored just fine, but then reports 
> that
> dhcp is running forever.
> So my question is, do we have any tools to analyze the dhcpd traffic 
> and
> show me whats wrong?  AFAIK its working for my lappy, but it, from 
> where it
> normally lives in the shop, would be coming in thru another wirelass 
> AP in
> the shop, so its requests for dhcp service would actually be coming 
> into
> what I think is the only active server here via the routers WAN port, 
> not
> the radio.
> There is so much to know about this its easy to lose track of the 
> tree in
> all this forest of networking stuffs.  I suspect that somehow, in
> attempting to improve the caching of dns lookups on this, the main 
> machine,
> and have somehow managed to have it issuing a dhcpd response that 
> clashes
> with the intended server in this router/AP.
> But I need to tool to analyze this.
> Thanks folks.
> Cheers, Gene

In the tradition of this mailing list I should probably advise you to 
take a different approach, but I'll leave that for others.

Wireshark can do it:

Best of luck,

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