Voice VLAN

The voice VLAN function enables you to operate voice devices, e.g. VoIP telephone via plug-and-play.

For this purpose, you can use one or several VLANs configured in the Switch as voice VLANS and define voice VLAN network policy per port. The policy consists of the voice VLAN mode, the voice VLAN ID and the voice VLAN priority. The Switch sends it via LLDP-MED to the terminal devices connected.

An LLDP-MED-capable terminal device can then determine the proper settings automatically in order to receive its data traffic.

What is required for this is that you activate at the Switch both the LLDP (refer LLDP Information from Neighbor Devices) and the LLDP-MED (refer LLDP-MED (Media Endpoint Discovery)).

This dialog allows you to do the following:

Tab. Global Settings for the Voice VLAN Dialog

Parameters

Meaning

Possible values

Default setting

Frame Operation

Globally activates or deactivates the transmission of a port-specific voice VLAN network policy via LLDP-MED.

Note: To transmit the voice VLAN network policy you must have activated both the LLDP (refer LLDP Information from Neighbor Devices) and the LLDP-MED (refer LLDP-MED (Media Endpoint Discovery)).

On, Off

Off


Tab. Settings for the Voice VLAN Dialog

Parameters

Meaning

Possible values

Default setting

Port

Module and port numbers to which this entry applies

-

-

Voice VLAN Mode

Mode of the voice VLAN network policy which the Switch communicates via LLDP-MED to the devices connected.

  • disabled: The Switch does not sent a voice VLAN network policy.

  • none: The Switch sends the voice VLAN network policy of "none", i.e. that the device connected is to use its own configuration.

  • untagged: The device connected is to send untagged frames.

  • vlan: The device connected is to send VLAN-tagged frames.

  • dot1p-priority: The device connected is to send priority-tagged frames (with VLAN ID 0).

  • vlan & dot1p-priority: The device connected is to send VLAN- and priority-tagged frames.

disabled, none, untagged, vlan, dot1p-priority, vlan & dot1p-priority

disabled

VLAN ID

VLAN ID of the voice VLAN network policy which the Switch communicates via LLDP-MED to the devices connected.

Note: Use a VLAN ID that is already configured in the Switch.
This is how you enable the plug-and-play start-up of a voice device.

0 - 4094

0

Priority

Layer 2 (802.1p) priority of the voice VLAN network policy which the Switch communicates via LLDP-MED to the devices connected.

none, 0 - 7

none

Bypass authentification

  • On: For active 802.1X authentication, the device connected must first authenticate itself at the Switch. Only then will the Switch allow the device's data traffic on its port.

  • Off: However, the Switch will ultimately allow the data traffic for a connected device despite an active 802.1X authentication, if
    - the device has identified itself via LLDP-MED as a voice device, and
    - the device sends tagged frames with the voice VLAN ID.

Note:
  • If you are using the authentication for a port, activate the 802.1X-based port security at this port (refer 802.1X Port Configuration).
  • If you are using the 802.1X-based port security, connecting more than one device to a porta and are also using voice authentication, then activate the MAC-based authentication.
  • If you have set MAC- or IP-based port security for this port, it remains active in any case.
  • Only use IP-based port security if the voice device has a secure IP address.

On

Off

On


a For example, a VoIP telephone with integrated switch, to which you have connected a PC.

Buttons

Tab. Buttons (Forts.)

Button

Meaning

“Set”

Transfers the changes to the volatile memory (RAM) of the device. To permanently save the changes afterwards, you open the Basic Settings:Load/Save dialog and click “Save”.

“Reload”

Updates the fields with the values that are saved in the volatile memory (RAM) of the device.

“Help”

Opens the online help.