Has anyone seen Duplex MisMatch errors on a N7k with a LAG going to the 5508 WLC? WLC code is 188.8.131.52.
I found a BUG that is private to Cisco ( CSCth11041 ) that looks like it, but I want to make sure.
Any help would be appreciated.
A duplex mismatch is a situation where the switch operates at full duplex and the connected device operates at half duplex or vice versa. The results of a duplex mismatch are extremely slow performance, intermittent connectivity, and loss of connection. Other possible causes of data link errors at full duplex are bad cables, faulty switch ports, or client software or hardware issues.
Resolution : Since for 5500s WLC , data rate is fixed 1k full duplex, please check the switch side data rate , make sure it is set to 1000 Mbps Full Duplex.
The problem is not a speed/duplex issue. It is a compatibility issue between the 7k and 5508 CDP. You will get this error even if you use 1Gbps fiber where you cannot set speed and duplex.
You can disable CDP on the WLC and the errors go aways. I think some versions of code on the 7k support the "no CDP enable" under the interfaces to the controller which should resolve it as well.
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Yes i checked the port speed on both WLC and switch. Both are Set on 1000. full duplex. but still the same issue.
My WLC is connected to 5k , (5548 UP) not 7k, i have another 5500 WLC connected to differentnexus 5k. it is not throwing any duplex errors, so i dont think it is a compatibility issue, any more ideas