CLI Reference Guide-R04

Chapter 9 | General Security Measures
Network Access (MAC Address Authentication)
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◆ Authenticated MAC addresses are stored as dynamic entries in the switch
secure MAC address table and are removed when the aging time expires. The
maximum number of secure MAC addresses supported for the switch system is
1024.
◆ Configured static MAC addresses are added to the secure address table when
seen on a switch port. Static addresses are treated as authenticated without
sending a request to a RADIUS server.
◆ MAC authentication, 802.1X, and port security cannot be configured together
on the same port. Only one security mechanism can be applied.
◆ MAC authentication cannot be configured on trunks (i.e., static nor dynamic).
◆ When port status changes to down, all MAC addresses are cleared from the
secure MAC address table. Static VLAN assignments are not restored.
◆ The RADIUS server may optionally return a VLAN identifier list. VLAN identifier
list is carried in the “Tunnel-Private-Group-ID” attribute. The VLAN list can
contain multiple VLAN identifiers in the format “1u,2t,” where “u” indicates
untagged VLAN and “t” tagged VLAN. The “Tunnel-Type” attribute should be
set to “VLAN,” and the “Tunnel-Medium-Type” attribute set to “802.”
Example
Console(config-if)#network-access mode mac-authentication
Console(config-if)#
network-access port-
mac-filter
Use this command to enable the specified MAC address filter. Use the no form of
this command to disable the specified MAC address filter.
Syntax
network-access port-mac-filter filter-id
no network-access port-mac-filter
filter-id - Specifies a MAC address filter table. (Range: 1-64)
Default Setting
None
Command Mode
Interface Configuration
Command Mode
◆ Entries in the MAC address filter table can be configured with the network-
access mac-filter command.
◆ Only one filter table can be assigned to a port.