Hello, first, I am peon with college experience. I am not in charge of this situation, I was put in the mix-up so you need to realize that I do not run the show, I follow orders. We have an Xserve RAID hosting an Open Directory, DHCP, Net Boot, AFP and a time server. The server processor is always in very low usage and our memory still has plenty of space remaining; however, the network goes SO SLOW. Now, the server doesn't host DNS. This is because there is a 3rd party guy involved since neither the director, nor the network administrator are confident in network administration (DNS, VPNs, Postfix, Dovecot, Apache... everything). The network seems fine until the Open Directory accounts log on and then the crawl begins. I remember from my college Active Directory days (I said a bad word), that it is extremely critical that DNS is set up correctly before doing anything. Not that I would be able to test anything, but do you think that DNS not being configured on the Xserve could be the problem? I've heard of issues with regards to slowness when both NICs aren't properly configured... even the outside NIC that clients shouldn't ever even touch. I've looked at network traffic through Etherape and Wireshark in the MDF and ever since installing the NHR package (keeps junk like caches stored locally), the network has been very clean and our switching equipment appears to be functioning correctly. P.S. The server is running on 10.4.11 server software and the clients are all 10.4.11 or 10.3.9.