Blacklist and whitelist roles are special roles that are evaluated before all the other role types. If an identity is listed in a blacklist, that identity is denied all access to the network without consideration of any other roles to which it might belong. Similarly, if a discovered identity is found in the whitelist, that identity is granted complete network access, and no further role processing occurs for that identity.
Username (with or without a domain name)
The type of identity attribute specified in a blacklist or whitelist impacts the locations from which an identity can access a switch. For example, if a MAC address or an IP address is specified in a blacklist, no access is permitted from any user at devices with the specified address. If a username is specified in a whitelist, that user is permitted access from all locations.
When an identity accesses the switch and that identity is in a blacklist or whitelist, the switch installs a specific deny or allow ACL on the port through which the identity attempts access. The installed ACL is an active ACL that explicitly denies or allows traffic from that identity. There is no passive action that takes place if the identity is not listed in the ACL. When the identity is not listed in a blacklist or whitelist, the switch checks for matches to other roles as described in Role Precedence and Priority.