Chapter 8
| General Security Measures
Network Access (MAC Address Authentication)
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Command Mode
Global Configuration
Command Usage
◆ Specified addresses are exempt from network access authentication.
◆ This command is different from configuring static addresses with the mac-
address-table static isolation command in that it allows you configure a range
of addresses when using a mask, and then to assign these addresses to one or
more ports with the network-access port-mac-filter command.
◆ Up to 64 filter tables can be defined.
◆ There is no limitation on the number of entries that can entered in a filter table.
Example
Console(config)#network-access mac-filter 1 mac-address 11-22-33-44-55-66
Console(config)#
mac-authentication
reauth-time
Use this command to set the time period after which a connected MAC address
must be re-authenticated. Use the no form of this command to restore the default
value.
Syntax
mac-authentication reauth-time seconds
no mac-authentication reauth-time
seconds - The reauthentication time period. (Range: 120-1000000 seconds)
Default Setting
1800
Command Mode
Global Configuration
Command Usage
◆ The reauthentication time is a global setting and applies to all ports.
◆ When the reauthentication time expires for a secure MAC address it is
reauthenticated with the RADIUS server. During the reauthentication process
traffic through the port remains unaffected.
Example
Console(config)#mac-authentication reauth-time 300
Console(config)#
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