VLAN Management
Voice VLA N
Cisco Small Business 300 Series Managed Switch Administration Guide 208
12
•Voice V LAN 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 is not the best local source.
STEP 3 Click Refresh to refresh the information on the page
Configuring Telephony OUI
OUIs are assigned by the Institute of Electrical and Electronics Engineers,
Incorporated (IEEE) Registration Authority. Since the number of IP phone
manufacturers is limited and well-known, the known OUI values cause the relevant
frames, and the port on which they are seen, to be automatically assigned to a
Voice V LAN.
The OUI Global table can hold up to 128 OUIs.
This section covers the following topics:
•Adding OUIs to the Tel eph ony OU I Tab le
•Adding Interfaces to Voice VLAN on Basis of OUIs

Adding OUIs to the Telephony OUI Table

Use the Telephony OUI page to configure Telephony OUI QoS properties. In
addition, the Auto Membership Aging time can be configured. If the specified time
period passes with no telephony activity, the port is removed from the Voice
VLAN.
Use the Telephony OUI page to view existing OUIs, and add new OUIs.