mkhajehali
Registered
I am in charge of maintaining a Mac lab with 40 Intel Mac Pro workstations based on Mac OS X Tiger, hosted by Windows DHCP server for Internet access. All these Macs have two Ethernet ports at the back of the machine which I refer to them as Ethernet port 1 and 2. They were all connected to a central switch from Ethernet port 1 to our LAN. For no apparent reason I lost Internet connectivity on all 40 Mac stations last week, but when I switched all the ethernet cables to Ethernet port 2 at the back of the all 40 Mac stations I got Internet connectivity back! Does it make sense? To eliminate any doubt or possiblity that problem could have been caused internaly within the Macs themselves, I connected a few of Macs from Port 1 to another local switch of different gateway ip address Exp: 198.168.yy.254 and to my surprise I got the Internet back on Port 1. In other word, if I go buy a Mac machine right now from an Apple store with two Ethernet ports and connect it through its Ethernet port 1 to any LAN switch in the WORLD I woud have Internet access except the switch in our local area network that have been assigned to my Macs from our IT department. Our Network engineers don't have any experience working with Macs and they try to blame it on my Macs configuration and I am trying to prove them wrong. Is it possible that there might be a table log on Windows DHCP server that locks the MAC addresses of Ethernet port 1 and prevent the port accessing the Internet. If it is true, why it allows the port 2 for Internet access but not port 1. I am just looking for a techincal literature so I can tell our network engineers what to do. I am also afraid to lose the Internet access on Ethernet port 2 in the midde of final exams. This is a computer lab.. Any suggestion?
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