Slow 100 mbps port - Cisco 1924 Switch

[vkurikala]

I have a problem with Cisco 1924 Switch. <br>
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The Server is a PIII machine,128 MB RAM, 9 GB HDD with a 3 Com Fast Ethernet Card installed and running on NT4.0. <br>
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When it is connected to the 100 mbps port on the switch, the performance is coming down drastically. A 5 MB file transfer is taking about 15 minutes and sometimes it even cancells with a message that a serious network error has occured. It is the same on both the 100 mbps ports. When the same server is connected to a 10 mbps port it is taking about 30 seconds to transfer. <br>
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I have checked the port performance statistics and there are absolutely no collision or transmit/receive errors. <br>
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I have tried all combinations of configuration like making it full duplex, half duplex, agressive Enhanced Congestion Control etc but to no avail. I even did a factory reset but things did not improve.<br>
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I have tried on two switches and it is slightly better on the other switch. It is taking about 5 min for 5 MB file transfer.<br>
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Could anyone please let me know what could be wrong and how to solve this problem.<br>
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[muck]

Is i a 3com 905 card - if so we've had lots of probs with them and the only real solution is to set to auto on the switch and auto the card - once youv'e found the best speed for the card - set it on the switch (ie:half/100). For best use try an accton card on the w/s - they're brill and never seem to have prob, always connecting at the best possible line speed - Maybe you should also check out the cabling...
M

 

[muck]

Is it a 3com 905 card - if so we've had lots of probs with them and the only real solution is to set to auto on the switch and auto the card - once youv'e found the best speed for the card - set it on the switch (ie:half/100). For best use try an accton card on the w/s - they're brill and never seem to have prob, always connecting at the best possible line speed - Maybe you should also check out the cabling...
M

 

[JRodz]

I believe that the Cisco Catalyst 1900 Series Switches are only 10Mbps...the 2900 Series are 10/100Mbps. That might be your problem there...

 

[wybnormal]

Absolutely- the 1900 series is 10baseT on the first 24 ports and 1 10/100 uplink port which can be fiber/ RJ45 or AUI in the back.

I would guess a bad cable since this port is normally pretty easy to use. If you have a sniffer, get it out and take a look. My gut feeling is to dump the 3com card and go IntelExpress which have proven to be very bulletproof. The fact of three switches have this problem points to the NIC or cabling.

Mike S