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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 11 Configuring IEEE 802.1x Port-Based Authentication
Configuring 802.1x Authentication
To disable periodic re-authentication, use the no authentication periodic or the no dot1x
reauthentication interface configuration command. To return to the default number of seconds between
re-authentication attempts, use the no authentication timer or the no dot1x timeout reauth-period
interface configuration command.
This example shows how to enable periodic re-authent
ication and set the number of seconds between
re-authentication attempts to 4000:
Switch(config-if)# dot1x reauthentication
Switch(config-if)# dot1x timeout
reauth-period 4000
Manually Re-Authenticating a Client Connected to a Port
You can manually re-authenticate the client connected to a specific port at any time by entering the dot1x
re-authenticate interface interface-id privileged EXEC command. This step is optional. If you want to
enable or disable periodic re-authentication, see the “Configuring Periodic Re-Authentication” section
on page 11-45.
This example shows how to manually re-authenticate the client connected to a port:
Switch# dot1x re-authenticate interface gigabitethernet2/0/1
Step 4
authentication timer {{[inactivity |
reauthenticate] [server | am]} {restart
value}}
or
dot1x timeout reauth-period {se
conds |
server}
Set the number of seconds between re-authentication attempts.
The authenticati
on timer keywords have these meanings:
• inactivity—Interval in seconds after which if there is no activity from
the client then it is unauthorized
• reauthenticate—Time in seconds after which an automatic
re-authentication attempt is be initiated
• server am—Interval in seconds after which an attempt is made to
authenticate an unauthorized port
• restart value—Interval in seconds after which an attempt is made to
authenticate an unauthorized port
The dot1x timeout r
eauth-period keywords have these meanings:
• seconds—Sets the number of seconds from 1 to 65535; the default is
3600 seconds.
• server—Sets the number of seconds based on the value of the
Session-Timeout RADIUS attribute (Attribute[27]) and the
Termination-Action RADIUS attribute (Attribute [29]).
This command affects the behavior of the switch only if periodic
re-aut
hentication is enabled.
Step 5
end Return to privileged EXEC mode.
Step 6
show authentication interface-id
or
show dot1x interface int
erface-id
Verify your entries.
Step 7
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
