Poor download speeds with a Cisco 1 gig 2960 Switc.

I have a Cisco 2960 gig switch and then two older Cisco 2960 100 meg switches.  My internet download speeds are great from my gig switch to my 100 meg switch ( users connected to that switch runs speed test that are 90 meg down and 90 meg up.  When a user is connected to the Gig switch (same switch the 100 meg switch is connected to) and are configured to Auto (on the Switch) and Auto (on the workstation) which they connect at 1 gig, their speeds are 90 down and 20 up?  When I configure the gig switch port to 100 meg and the workstation stays at Auto (connects then at 100 full duplex) the speeds go to 90 down and 90 up?  Workstations on the network connect to servers and applications at 1 gig just fine?  Any help would be greatly appreciated.
Montana ManIT SupportAsked:
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Montana ManIT SupportAuthor Commented:
Thanks for both of your comments and help.  for Naderz I have both sides configured the same, tried both hard coded and auto/auto and none worked.  I have tried multiple workstations and none have worked.  I put in a Dlink gig switch and it worked perfect.  My Cisco 2960 gig switch does not.  if I force the switch ports to 100/full and leave the pc's on auto/auto it works, if I put the switch ports on 100/full and the pc's on 100/full it works.  With the Cisco it does not work in "gig" mode at all.  When I am connected at Gig speeds my download tests go down to 20 meg, if I leave configured at 100/full my downloads go up to 92 meg?  it has to be a config on the Cisco or firmware....  Thanks again.
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RafaelCommented:
hard code the switch and workstations to 1Gb Full Duplex. What are the results ?

Also are you running port fast on your nterface config?

Can you post a config please ?

HTH
-Rafael
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Montana ManIT SupportAuthor Commented:
I tried hard coding the switch ports and PC's and the outcome is the same.  I did just put in a "cheap" dlink gig switch which is not manageable and it worked perfect?  so now I think it has to be something with the Cisco 2960 Switch (firmware?).
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RafaelCommented:
could still be a config issue between the switches.  Can you provide a clean copy of the 2960 's sh run ?

Is this command on your interfaces ?
"spanning-tree portfast"
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Montana ManIT SupportAuthor Commented:
the spanning-tree portfast is not on the switches
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Montana ManIT SupportAuthor Commented:
We are not seeing any spanning tree issues.
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Montana ManIT SupportAuthor Commented:
I think it is something with buffers?
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naderzCommented:
Here are some suggestions:

1. Always configure both ends of the connection exactly the same for duplex/speed: either auto/auto on both ends or hard coded on both ends with exact same values.

2. Try multiple workstations on the 2960 with Gig connection and see if they all have the same issue.

I would suspect either port misconfiguration on one end (speed/duplex settings) or just the fact that your workstation network drivers cannot actually handle Gig connection correctly. Try multiple devices on the same port and test for differences.
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RafaelCommented:
The only place I have logging is in my configs and its as shown below.

logging buffered 102400 informational

Is it all the workstations or just a few.  Can you do a Show Tech and post it here or just a sh run minus IP addresses. It would be so much easier to troublehsoot
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Montana ManIT SupportAuthor Commented:
moved the connection to a older switch and now is working fine.
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