Sorry I just saw you fixed the issue. Jon
On Wed, Feb 17, 2010 at 12:17 PM, Jon Harris <[email protected]> wrote: > John are you using IPSec in the network? There was a discussion within > the last month where there was a bug of sorts with using IPSec and 2008 DHCP > the fix looked easy but if > you are not using IPSec then it is not going to help much. I personally > never saw an issue with a mix of XP and Vista clients but I had a flat IP > space. > > Jon > > On Wed, Feb 17, 2010 at 11:39 AM, Kurt Buff <[email protected]> wrote: > >> If you are sniffing on the client or at the switch, Wireshark. >> >> If you are sniffing on the server, either Wireshark or the Network >> Monitoring Tools that come with the OS. >> >> However, if you can get one of these machines to get an IP address, >> and then do an 'ipconfig /all' you'll see what it thinks is the DHCP >> server. >> >> Kurt >> >> On Wed, Feb 17, 2010 at 06:46, John Hornbuckle >> <[email protected]> wrote: >> > Yesterday I started having some DHCP weirdness that has grown today. I’m >> > kind of stumped and need some guidance. >> > >> > >> > >> > DHCP server is Windows Server 2008. It’s also a DC and DNS server. It >> shows >> > no errors relating to DHCP in Event Viewer, and there are plenty of >> > addresses left in the scope. It can be pinged from client machines at >1 >> ms >> > and no timeouts, and it can ping client machines with the same results. >> DNS >> > is working fine. DC functions are working fine. >> > >> > >> > >> > DHCP, unfortunately, appears spotty. A number of clients (although >> > apparently not all, from what I can tell) can’t get leases. If you run >> > ipconfig /renew from a command prompt, they report that they can’t >> contact >> > the DHCP server. If you manually assign an IP address, all works fine. >> So >> > network connectivity seems okay—this seems to be strictly a DHCP issue. >> > >> > >> > >> > I’m guessing that I’m going to need a packet sniffer to further >> > troubleshoot. I have to confess, though, that I’ve never in my life used >> > one. I’ve just never needed to. >> > >> > >> > >> > So, can anyone recommend a free, simple packet sniffer I can run from a >> > client machine to watch the DHCP traffic? And what, exactly, should I be >> > looking for? >> > >> > >> > >> > >> > >> > >> > >> > John Hornbuckle >> > >> > MIS Department >> > >> > Taylor County School District >> > >> > www.taylor.k12.fl.us >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > NOTICE: Florida has a broad public records law. Most written >> communications >> > to or from this entity are public records that will be disclosed to the >> > public and the media upon request. E-mail communications may be subject >> to >> > public disclosure. >> > >> >> ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ >> ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ >> >> > > > > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
