![]() ![]() attach or session into each member of stack and run the command "show mac address-table " from each member of stack. show mac address-table address interface If that is the case, I would like to look at few outputs from switch stack in problematic situation. Do you see the problem when a PC is attached to the switch port? Lets assume port X is not learning any MAC but ping from CORE goes through, do you the see that packet is flooded by 2960X stack? ![]() What happens when you clear the ARP/CAM cache on CORE? Do you see the MAC/ARP is built on CORE correctly but 2960x stack does not show any entry? Does the ping go through? I hope the end host is not connected to any other switch apart from the stack in question, right? (I meant through a different NIC or so). Lets say you have a new device attached to 2960X stack and the stack is connected to CORE through a PO. I just wanted to get the understanding correct about your problem.
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