VLAN Management
Voice VL AN
Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version)  219
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• Dynamic Voice VLAN—Select this field to disable or enable voice VLAN 
feature in one of the following ways:
-
Enable Auto Voice VLAN
—Enable Dynamic Voice VLAN in Auto Voice 
VLAN mode.
-
Enable Telephony OUI
—Enable Dynamic Voice VLAN in Telephony OUI 
mode.
-
Disable
—Disable Auto Voice Vlan or Telephony OUI.
• Auto Voice VLAN Activation—If Auto Voice VLAN was enabled, select one 
of the following options to activate Auto Voice VLAN:
-
Immediate
—Auto Voice VLAN on the device is to be activated and put 
into operation immediately if enabled.
-
By External Voice VLAN Trigger
—Auto Voice VLAN on the device is 
activated and put into operation only if the device detects a device 
advertising the voice VLAN.
NOTE Manually re-configuring the voice VLAN ID, CoS/802.1p, and/or DSCP 
from their default values results in a static voice VLAN, which has higher 
priority than auto voice VLAN that was learned from external sources.
STEP  3 Click Apply. The VLAN properties are written to the Running Configuration file.
Displaying Auto Voice VLAN Settings
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: