Hi all, i have been looking in to flow-control for a while now and have come to the conclusion that its best turned off on server -> switch connections. Although it might not be the best option for all circumstances, if you are running just TCP/IP over that link, then TCP has its own network layer measures for managing congestion, retries, timeout etc, so why have another process that could confuse and interfere with TCP. Try getting the admin to turn off flow-control (send and recieve) and you do the same and see if the errors continue. If anyone has any better info on flow-control, especially any Cisco recommendations on the process, then I for one would be very interested to read them. Thanks.
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Hi there, Im guessing you have resolved your issue by now, but basically it looks like you have a cabling issue on NIC 2. As your adapters are 1000Mb the HP driver will have diagnostics built in to the software or use some mod taps to check all pairs are working. Someone mentioned earlier that if the switches are stacked (3750s) then I do beleive you can create an etherchannel across two switches and utilise both NIC's for inbound and outbound traffic. I personally prefer to force the team at both ends (cisco switch port-channel and HP "switch assisted load balancing"). If you dont have a network cabling issue on NIC 2 then its possible you have a "flow- control" mismatch on one of the team members, check the setting on the switch and HP driver. Hope this advice helps.
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