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trippleO7

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Slow file xfer over 100Mbps link

Hi Experts,

I'm having issues determining what's causing slow transfer speeds between a server and all workstations located in the same remote office.  The remote office and main office are connected via 11Mbps wireless link, all under 1 domain.  However, the files I'm trying to copy are located at the remote office server (just a member server), using a workstation at that remote office as well.

We have CAD files at around 100MB in size, and it takes ~2-3 minutes for the the workstation and server at the remote site to copy files to each other.  We have a 100Mbps Nortel switch that these computers link at.  This just doesn't seem right?!?!?!?  Theoretically @ 100Mbps link speed, it should be 12.5MB per second xfer rate (100,000mbps/8 = 12,500 = 12.5MB/sec).  It should be more like 8-10 seconds.

In the meantime I've turned the remote server into a primary dns server, and pointing the workstations to that server.  Tried it again, and same result.

Here's some detail what my client grabs through TCP/IP...All DHCP is coming from the main site over the 11Mbps wireless

IP (DHCP):  172.25.5.100
S/N Mask (DHCP):  255.255.0.0
Gateway (DHCP):  172.25.0.10
DNS (Static):  172.25.1.70 (remote server address)

I even tried all static, but still the same issue.  I thought if I turned the remote site into a dns server, this would be resolved, but apparently not.  I still suspect it has something to do with the wireless, but it doesn't make sense if I'm pointing DNS to that remote-site server from a remote-site workstation.

Any ideas what I'm doing wrong?
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Pber
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Further to my previous post, it may just be the server that is set wrong.  The clients will probably still be defaulted to Auto/Auto, and so might the switch ports.  Can the clients transfer that same file between each other quickly?



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trippleO7

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I'll have to try the xfer between workstations a try as soon as I get a chance.  and check the duplex settings.
I still haven't been able to run out to our remote site and check those settings.  I'll post again once I get out there.
fair enough.
I remotedinto the nortel switch, the server, and the workstation are they are all set to Auto duplexing.  
What do the link stats on the switch tell you?  Are you getting CRC errors?
Also depending on your NIC driver, you may have these stats on the NIC as well.  Usually Transmit or Receive errors.
There were CRCAlign errors (snmp string), but not a large number.  I remoted back into the switch just to verify duplexing was set to auto on all the ports, and it wasn't, just a few of them.  I don't know who changed it, but now they are all set to auto duplexing.  I had the user try the xfer again with that 100MB file....now it's xferred in 20 seconds he said.  It worked!!!!

You rock!  thanks for all the help!
Glad to help.  I've seen that problem so many times.