On Thu, 18 Nov 2010, Bryan Anderson wrote:
> All phones get their IP's from the DHCP server distributed
> on the SipXecs ISO.
It is not unheard of for a MAC address, which is used to try
to ensure uniqueness of IP assigmment to be duplicated by a
hardware vendor [I have some specialty hardware that
intentionally does just that] ; similarly an IP assignment
pool can sometimes be exhausted
IP conflicts on a lan can cause failures.
I think I would be firing up tcpdump on the monitor port of a
switch, or setting up hubbed fabric between the DHCP server
and the rest of the LAN, and watching the DHCP assignment
conversations closely [port 68] as I plugged and unplugged
units at this point
something like:
tcpdump -i eth0 -nN -xX -s 1500 port 68
see for more details:
http://www.owlriver.com/tips/tcpdump-tech/
-- Russ herrold
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