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BTW, many many Unix/Linux/VMware vendors allow you to change/override the MAC address of your ethernet boards. So this is might not be an uncommon event if you happen to copy configurations from one system to another. That is what happened to me.

mdpc
– mdpc

2013-01-03 21:52:33 +00:00
Commented Jan 3, 2013 at 21:52
It sounds like a possible way to attack a host (such as the default gateway). Even if Dynamic ARP Inspection is turned on, the switch will still see your MAC address in a DHCP discover message. We use 802.1X, so we can't have port security turned on at the same time. In that situation I think the only way to defend against that is to use static entries in DAI.

Brain2000
– Brain2000

2017-02-12 01:35:40 +00:00
Commented Feb 12, 2017 at 1:35
@mdpc - Windows OS/s can also have their MAC overridden in software.

Les
– Les

2018-02-24 14:08:45 +00:00
Commented Feb 24, 2018 at 14:08

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