i have one issue with 2924 series switch. i have configured the port security with the following commands:
po sec max 1
po sec vio shut
assume that i have connected pc "A" to fas 0/1 interface and the port binds the mac of pc "A".
But after few days the port got violated with the unknown mac and i noticed that the unknown mac almost matches with the pc "A" mac (except 3 to 4 bits) of mac that was learned by that port. Why it happens? from where did this unknown mac come from? why it is alomost similar to the pc A mac?
plz help me.