could be due to buffering. Check out this link.http://www.cisco.com/warp/public/63/buffertuning.htmlclick on the output interpreter and then cut and paste the data from a "sh int" and a "sh buffer". Hope this helps.-Regards

Are you saying that the MAC the port locks down is a MAC other than the directly connected device? With CISCO I have not seen that happen. With Foundry, when using dynamic VLANS, that can occur. The only thing I could suggest is to try to clear port ...

As others have stated here, this sounds to me like a routing issue as opposed to a switching issue. Someone already gave some good advice here .... if you can re-create the configs, check the routing tables. I think you might find that router B just ...