Users Guide

Layer 2 Switching Commands 900
Default Value
trust
Example
console(config)#interface gigabitethernet 1/0/1
console(config-if-Gi1/0/1)#voice vlan data priority untrust
console(config-if-Gi1/0/1)#voice vlan data priority trust
authentication event server dead action authorize
voice
Use the authentication event server dead action authorize voice command
to allow voice VLAN access when no AAA server can be contacted. Use the no
form of the command to disable voice VLAN access in such cases.
Syntax
authentication event server dead action authorize voice
no authentication event server dead action authorize voice
Default Configuration
Critical voice VLAN is disabled by default.
Command Mode
Interface Configuration mode (Ethernet)
User Guidelines
During authentication, the switch identifies a device as a voice device when
an Access-Accept is received from the AAA service with Cisco proprietary
VSA device-traffic-class=voice. Phones/devices using the voice VLAN are
periodically reauthenticated. If no AAA server is available during
reauthentication, access to the voice VLAN is removed when authentication
fails.
Critical voice VLAN supports voice VLAN access on an interface connected
to an 802.1X-capable host during RADIUS server outages. Use of this
command allows traffic to continue to flow over the voice VLAN when no
RADIUS server is available to reauthenticate the IP phone. Newly