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5189
January 13th, 2005 22:00
PowerConnect 5324 10/100 Connectivity Problem!
We bought a 5324 a couple of months ago and have never gotten it to work with any 10/100 based devices properly. This switch is connected to a Cisco 2620, PIX 520, and VPN 3005 Concentrator, and all ports show tons of Receive Errors (specifically, Frame Check Sequencing [FCS]) errors.
We had some Intel 82555 based built-in NICS in a lot of our servers... which would not come on unless set to 10/half. So we bought Gb NIC's for all of our servers to get around this. In fact, no 10/100 based devices (access points, etc.) work without tons of these FCS errors, if they even show a link at all.
We cannot put Gb NIC's in the Cisco devices, so we need this problem fixed. We've turned off Spanning Tree on each port and still the errors continue. The Cisco devices have their NICs now set to 100/Full manually.
I don't see any other posts like this so I have to assume there is nothing wrong with the switch itself- it must be some setting(s) that we have wrong.
I'm about to jump out of a window here with this problem. If anybody can help I would greatly appreciate it!
Thanks!
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GregG1
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January 17th, 2005 11:00
If the Cisco devices are hard-set for 100full, you would need to disable auto MDIX and negotiation on the 5324. Using auto negotiation on one side of the link and hard-set 100full on the other side will cause a duplex mismatch. This will cause the link to work at half duplex. See the following link to the online CLI Guide for the "negotiation" and "mdix" commands:
http://support.dell.com/support/edocs/network/pc5324/en/CLI/ethernet.htm#1015373
FCS errors and other physical layer problems are typically caused by sub-standard cabling. If you have not done so already, try bypassing your building cabling and uplink the two devices directly using pre-fabricated store-bought cat5e (or higher spec) cabling. I have uplinked the 5324 to other Cisco devices including a 2621, Cat 6509, and PIX 501 with no problems.