2e66a53a_cks___Aggressive_Virus_Defense__2
[Denial of Service] MAC flood Spoofed source MAC address and port in packet (requests a destination, of course); this takes a slot in the CAM table and broadcasts requests for the destination MAC address. Repeat sufficiently and fill the CAM table and consume bandwidth. This is a layer 2 attack which requires port access; port access can reveal information to a network device in promiscuous mode. [2] 
Limit number of source MACs per port Switch(config-if)#switchport port-security [maximum value] violation {protect | restrict | shutdown} Restrict port to specific addresses
Attacks | Aggressive Virus Defense
2