Auto Voice VLAN

Auto Voice VLAN is responsible to maintain the voice VLAN, but depends on Auto Smartport to maintain the voice VLAN port memberships. Auto Voice VLAN performs the following functions when it is in operation:

When activated, Auto Voice VLAN performs the following tasks:

It finds information about voice VLANs in CDP advertisements from directly connected neighbor devices.
If multiple neighbor switches and/or routers advertise their voice VLAN, such as Cisco Unified Communication (UC) devices, the voice VLAN from the device with the lowest MAC address is used.

If Auto Voice VLAN mode is enabled, use the Auto Voice VLAN page to view the relevant global and interface parameters.

You can also use this page to manually restart Auto Voice VLAN, by clicking Restart Auto Voice VLAN. After a short delay, this resets the voice VLAN to the default voice VLAN and restarts the Auto Voice VLAN discovery and synchronization process on all the switches in the LAN that are Auto Voice VLAN enabled.

Note	This only resets the voice VLAN to the default voice VLAN if the Source Type is in the Inactive state.

To view Auto Voice VLAN parameters:

Procedure

Step 1

Click VLAN Management > Voice VLAN > Auto Voice VLAN.

The Operational Status block on this page shows the information about the current voice VLAN and its source:

Auto Voice VLAN Status—Displays whether Auto Voice VLAN is enabled.
Voice VLAN ID—The identifier of the current voice VLAN
Source Type—Displays the type of source where the voice VLAN is discovered by the root device.
CoS/802.1p—Displays CoS/802.1p values to be used by the LLDP-MED as a voice network policy.
DSCP—Displays DSCP values to be used by the LLDP-MED as a voice network policy.
Root Switch MAC Address—The MAC address of the Auto Voice VLAN root device that discovers or is configured with the voice VLAN from which the voice VLAN is learned.
Switch MAC Address—Base MAC address of the device. If the device's Switch MAC address is the Root Switch MAC Address, the device is the Auto Voice VLAN root device.
Voice VLAN ID Change Time—Last time that voice VLAN was updated.

Step 2

Click Restart Auto Voice VLAN to reset the voice VLAN to the default voice VLAN and restart Auto Voice VLAN discovery on all the Auto-Voice-VLAN-enabled switches in the LAN.

The Voice VLAN Local Source Table displays voice VLAN configured on the device, and any voice VLAN configuration advertised by directly connected neighbor devices. It contains the following fields:

Interface—Displays the interface on which voice VLAN configuration was received or configured. If N/A appears, the configuration was done on the device itself. If an interface appears, a voice configuration was received from a neighbor.
Source MAC Address—MAC address of a UC from which the voice configuration was received.
Source Type—Type of UC from which voice configuration was received. The following options are available:
- Default—Default voice VLAN configuration on the device
- Static—User-defined voice VLAN configuration defined on the device
- CDP—UC that advertised voice VLAN configuration is running CDP.
- LLDP—UC that advertised voice VLAN configuration is running LLDP.
- Voice VLAN ID—The identifier of the advertised or configured voice VLAN
Voice VLAN ID—The identifier of the current voice VLAN.
CoS/802.1p—The advertised or configured CoS/802.1p values that are used by the LLDP-MED as a voice network policy.
DSCP—The advertised or configured DSCP values that are used by the LLDP-MED as a voice network policy.
Best Local Source—Displays whether this voice VLAN was used by the device. The following options are available:
- Yes—The device uses this voice VLAN to synchronize with other Auto Voice VLAN-enabled switches. This voice VLAN is the voice VLAN for the network unless a voice VLAN from a higher priority source is discovered. Only one local source is the best local source.
- No—This isn’t the best local source.

Step 3

Click Refresh to refresh the information on the page