This command enables authorization of voice devices on the critical voice VLAN when all the authentication servers are dead. The configured voice VLAN of the port, on which the voice device is connected, is used as the critical voice VLAN ID.
The connected device is identified as a voice device by the vendor-specific RADIUS attribute "device-traffic-class=voice", which is sent in the RADIUS Access-Accept message. This means that the device should have been identified and authenticated once by reachable RADIUS servers before they went dead. The critical voice VLAN feature is activated under the following conditions:
- This command is configured.
- The RADIUS servers have stopped responding (i.e. are dead).
- A re-authentication of identified and authenticated voice devices occurs.
When this command is not configured, the voice device is not authorized when all RADIUS servers are dead.
| Default | Action: None |
| Format | authentication event server dead action authorize voice |
| Mode | Interface Config |
