Static MAC assignment on a switch
mzinz
Member Posts: 328
in CCNA & CCENT
I don't understand the purpose of applying a static MAC address to a switch. I read about how it increases security, and will never be flushed out.. but I don't really understand how/why.
If I do this:
Switch(config)# mac-address-table static 1234.56AB.CDEF vlan 2 interface fa0/5
What will that do exactly?
Can ONLY the machine with that exact MAC address connect to int fa0/5? Does it have to be on vlan 2? If a certain port is assigned to a VLAN on the switch, and you apply a static MAC address which specifies a different VLAN.. will it still work?
It's all just very unclear to me.. If someone could sort of break it down, that would really help
If I do this:
Switch(config)# mac-address-table static 1234.56AB.CDEF vlan 2 interface fa0/5
What will that do exactly?
Can ONLY the machine with that exact MAC address connect to int fa0/5? Does it have to be on vlan 2? If a certain port is assigned to a VLAN on the switch, and you apply a static MAC address which specifies a different VLAN.. will it still work?
It's all just very unclear to me.. If someone could sort of break it down, that would really help
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Comments
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cambei
Member Posts: 62 ■■■□□□□□□□
It increases security in that if you had an office that was closed at night, someone couldn't just plug in a laptop into the port a high level employee uses and access that vlan etc, infact iirc the port on the switch shuts down and that user will not be connected to the network at all.