dhcpd trouble shooting utilities

Colin Law clanlaw at googlemail.com
Tue Nov 20 17:12:07 UTC 2012

On 20 November 2012 17:02, Gene Heskett <gheskett at wdtv.com> wrote:
> On Tuesday 20 November 2012 12:00:32 Colin Law did opine:
>> On 19 November 2012 18:36, Gene Heskett <gheskett at wdtv.com> 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.
>> I have had situations where messages displayed made it look as if it
>> was failing at the dhcp stage but actually it was not getting a good
>> connection in the first place.  Try configuring it with a fixed ip
>> address.  That will confirm (or otherwise) that it is dhcp that is
>> failing.
>> Colin
> Can a nook color do that?  I haven't noted anything in its menu's that
> might lead to that ability.

Ah, ok, that may not be possible.  In that case have you got another
wireless device that you can connect to the access point, with and
without dhcp, to see what can be learnt from that?


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