RTD-1-ADDR_FLAP [chars] relearning [dec] addrs per min
Explanation Normally, MAC addresses are learned once on a port. Occasionally, when a switched network reconfigures, due to either manual or STP reconfiguration, addresses learned on one port are relearned on a different port. However, if there is a port anywhere in the switched domain that is looped back to itself, addresses will jump back and forth between the real port and the port that is in the path to the looped back port. In this message, [chars] is the interface, and [dec] is the number of addresses being learnt.
Action Determine the real path (port) to the MAC address. Use debug ethernet-controller addr to see the alternate path-port on which the address is being learned. Go to the switch attached to that port. Note that show cdp neighbors is useful in determining the next switch. Repeat this procedure until the port is found that is receiving what it is transmitting, and remove that port from the network.
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