Mike, the DHCP server is running on Windows server 2003, will tcpdump still apply in this case? I also changed the scope with reference to the new addressing scheme. Dan, it's a windows domain :-( There are a number of unmanaged switches on the network, if at all there is any possibility that one of them could be supplying client machines with a wrong entry, before the DHCP server does, how is it that this only started happening after changing the addressing scheme?
On 8 February 2010 16:38, Mike Barnard <[email protected]> wrote: > On Mon, Feb 8, 2010 at 3:36 PM, Emmanuel Sekyewa <[email protected]> > wrote: > > Good afternoon, > > > > I'm in a situation in which after changing the IP addressing scheme on a > > network, certain machines obtain a wrong entry for DNS at startup, but > when > > I run an ipconfig /release and subsequently /renew, they pick up the > correct > > settings/configuration for the DNS server. I have gone through my DHCP > > configuration a number of times to ensure that the correct IP addresses > are > > specified for the primary and secondary DNS servers, but this still keeps > > coming up. > > This even happens after flushing the DNS cache on a client machine and > > rebooting. > > Any ideas of what could be causing this? Or a viable work around? > > > > 1 -- what platform are you running you DHCP server? > 2 -- The quickest way to check whether you have another DHCP server on > the LAN is to run tcpdump and listen out for any bootp traffic. A > quick run of tcpdump -i <interface> -n port 67 or port 68 will show > you all bootp traffic on your LAN. > 3 -- If you did not change the scope on your DHCP server, you may end > up with some wrong info. > > > > -- > Mike > > Of course, you might discount this possibility, but remember that one in > a million chances happen 99% of the time. > ------------------------------------------------------------ > _______________________________________________ > LUG mailing list > [email protected] > http://kym.net/mailman/listinfo/lug > %LUG is generously hosted by INFOCOM http://www.infocom.co.ug/ > > The above comments and data are owned by whoever posted them (including > attachments if any). The List's Host is not responsible for them in any way. > --------------------------------------- > > -- Emmanuel C. Sekyewa +256 782 199 202
_______________________________________________ LUG mailing list [email protected] http://kym.net/mailman/listinfo/lug %LUG is generously hosted by INFOCOM http://www.infocom.co.ug/ The above comments and data are owned by whoever posted them (including attachments if any). The List's Host is not responsible for them in any way. ---------------------------------------
