When you create a MAC address filter on WLCs, users are granted or denied access to the WLAN network based on the MAC address of the client they use.
There are two types of MAC authentication that are supported on WLCs:
Local MAC authentication
MAC authentication using a RADIUS server
With local MAC authentication, user MAC addresses are stored in a database on the WLC. When a user tries to access the WLAN that is configured for MAC filtering, the client MAC address is validated against the local database on the WLC, and the client is granted access to the WLAN if the authentication is successful.
By default, the WLC local database supports up to 512 user entries.
The local user database is limited to a maximum of 2048 entries. The local database stores entries for these items:
Local management users, which includes lobby ambassadors
Local network users, which includes guest users
MAC filter entries
Exclusion list entries
Access point authorization list entries
Together, all of these types of users cannot exceed the configured database size.
To Know how to configure Mac filtering please go to the below link.
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From CLI: (Cisco Controller) >transfer upload datatype crash (Cisco
Controller) >transfer upload filename (Cisco
Controller) >transfer upload mode tftp (Cisco Controller) >transfer
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