They are totally 22 MAC addresses in MAC address table now. This command adds MAC address to switch port Fa 0/5 for VLAN 100. How do MAC addresses get to switch MAC address table? They cloud be added as static entry with administrator:Ģ960-I(config)# mac address-table static vlan 100 interface Fa 0/5 Switch needs to be sure that the frame will be delivered to end PC so it floods frame to all the switch ports except the port Fa 0/4. If the port Fa 0/4 is in VLAN 200 switch can't use any entry in MAC address table because there is not any MAC address in VLAN200. Total Mac Addresses for this criterion: 21 If switch receives frame with destination MAc address 001a.4b79.70b8 on Fa 0/4 port it switches this frame to port Fa 0/1 if the the port Fa 0/4 is VLAN100. For doing this it needs to maintain MAC address table and be able to find destination MAC address, outgoing port, and VLAN.īellow is a MAC address table of Cisco 2960 8 ports switch. It must be able to inspect Ethernet header and choose outgoing switch port in particular VLAN. Unlike hub switch can forward traffic according to destination MAC address in received Ethernet frame. This is not very secured method because traffic is send to every port and could be captured by attacker. Hub is a network device which forwards Ethernet received frames to all the ports except the port on which hub previously received frames.
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