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Mutiple Authentication on Interface Causing Mac-Flap

Hi Cisco Engineers,

 

Have you experience a multiple authentication on one interface but there's no hub/switch connected to it. Only once PC connected to the interface but many Mac Addresses trying to authenticate (using 802.1x). As I traced the Mac Addresses, they are legit PC but connected to the ports of the other switch. It seems like Mac Spoofing.

 

I have researched what cause the issue, and some forums tells it's about Wake On LAN or Wake Up Proxy. But as I checked. there's no Wake On LAN or Wake Up Proxy configured on PCs/SCCM.

 

Please see the screenshots. Thank you.

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