Users Guide

Security Commands 949
Example
The following example configures an interface to support a critical data
VLAN (100) and to re-authenticate hosts when no RADIUS server is
reachable.
console(config)#vlan 100
console(config-vlan100)#interface gi1/0/1
console(config-if-Gi1/0/1)#authentication event server dead action
reinitialize vlan 100
authentication event server alive action
This command configures the actions to take when at least one
authentication server is reachable. Use the no form of the command to set
the interface configuration to the default.
Syntax
authentication event server alive action reinitialize
no authentication event server alive action reinitialize
Default Configuration
By default, hosts moved to the critical data VLAN are not moved back to the
port PVID when a RADIUS server becomes reachable.
Command Mode
Interface (Ethernet) Configuration mode
User Guidelines
When the alive action is configured to reinitialize, the switch triggers 802.1X
reauthentication of all authenticated hosts on the port. Hosts on the voice
VLAN, unauthenticated VLAN (authentication failed hosts) or guest VLAN
are not disturbed. During re-authentication, if all the servers are still dead,
the hosts are authenticated successfully into the critical data VLAN.
Command History
Syntax added in version 6.6 firmware.