Trace the MAC back to its source. Look for:- A link flapping on a upstream switch, causing spanning tree TCNs and Spanning Tree reconvergence. - A unidirectional link on an upstream switch causing the loop.- A hub or switch connected to a portfast en...

Yes, looks like you are hitting this bug (CSCsw18530) and why this IMAX power error popup on Cisco switch:After a PD (connected to one of our ports) is turned on, the hardware keeps on monitoring the current drawn by the PD so if the current drawn by...

What platform and IOS you are using?Do you see any MALLOCFAIL messages in the logs?

Yes you can do it. This configuration will work.Similar thread: https://supportforums.cisco.com/thread/2096090 Regards,Sweta

Hi Manu,Please find the answers inline:Question 1: That means the QoS packet need not go to  the CPU at all, right?All Cisco Catalyst switches perform QoS in dedicated hardware ASICs and do not use their main CPUs to process any of the QoS configurat...