I have a 2960 running IOS12.2(46)
I'm having a problem with MAC Notification traps. I have all ports configured to send MAC notification traps. When I connect my HP Laptop I get a trap with the cmnHistMacChangedMsg in the following format :
Which is correct according to the MIB.
When I connect a DELL desktop to the same device on the same ports I get a cmnHistMacChangedMsg with the following format :
That <???> appears to be two mystery bytes. I haven't had any luck tracking down what those could be.