Incompatability with Intel NICs and C350 switches???

[n1ckpaul77]

I have a situation whereby at random points in time, client computers (with Intel Pro/1000 NICs) momentarily lose connectivity with a C3550 switch to which these are connected.

Unfortunately, no link state changes appear in the log for a specific client previously identified as having the issue.

Where can I start to diagnose the issue?

[Georg Pauwen]

Hello,

the common recommendation is to update the driver for the NIC. You also might want to try and set the duplex and speed settings to a fixed value on both sides. Which model do you actually have (e.g. 3550 12G) ?

Can you post the configuration of the ports on the 3550 ?

Have a look at the documents below as well:

NIC Compatibility and Operation Issues

http://www.cisco.com/warp/public/473/46.html#nic_comp

Configuring and Troubleshooting Ethernet 10/100/1000Mb Half/Full Duplex Auto-Negotiation

http://www.cisco.com/en/US/tech/tk389/tk214/technologies_tech_note09186a0080094781.shtml

Regards,

GP