OSX Server 10.3.9 G5 File Transfer Weirdness

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codevyper

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Got a problem with out art dept here. We have an OSX 10.3.9 server and our art dept has about 8 people who connect to it throughout the day to work on files ranging in size from a few meg to as much as several hundred megs. The connection between the server and the art dept is over 1gb switches connected via fiber between the art dept and the server. All the G5 desktops in the art dept get their addresses via DHCP from a Win 2k DHCP server. The Mac server is static IP.

File xfers were working just fine for them until late last week when suddenly 5 computers in the dept slowed way down when grabbing files off the server and basically hangs when transferring files up to the server.


We rebooted the server, we've rebooted the desktops, we've rebooted the switches. Now here's the weird part...

If I shut down any of the G5 desktops and force the DHCP server to issue it a new address when it reboots, the file transfers go back to fast speeds as before. If I put the old IP address back, the machine goes back to slow transfers.
If I take another computer and issue it the address that was slow for the other computer, it brings that computer to a crawl. So it seems that the slow transfer rate is associated to particular IP addresses.

This didn't happen to all the macs in the dept and it also happened to a couple of PC's that connect to the mac. The PC's are speedy when transferring to a windows server but crawl the same way to the mac server.

One of the G5 desktops is running 10.3.9, the rest are 10.4.x.

I am not a Mac guru but is there anything on OSX server that would cache socket info from the old IP address? Or has anyone else ran across this and came up with a fix?

Thanks in advance for any help.
 
It sounds like you've got another machine on the network using the same IP address. Can you verify that the other computers all have unique IPs? Or perhaps the server is handing out that static IP to some DHCP client?
 
Hey ElDiabloConCaca,

Thanks for the response! The entire company is issued IP addresses from a single Windows AD/DHCP server. I looked for duplicate licences on the DHCP server when I was reserving the old IP address to prevent the G5 from getting the same address. I couldn't see any. The employees in the art dept aren't saavy enough to manually setup their own IP addresses.

All that having been said, I just now went on the network and tried pinging the offending IP address and nothing is being returned. Also, the way that the symptoms appeared, literally 8 people's computers instantly went to the slower speed after months of connectivity with no issues, so unless all of a sudden 8 computers jumped onto the net with conflicting IP's it's hard to imagine that happening.

We will probably reboot the DHCP server Friday after hours and see if that resolves the issue.

I really appreciate your input though and welcome any other ideas. Thanks again.

Codevyper
 
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