Telephony OUI

When traffic from Voice over Internet Protocol (VoIP) equipment is assigned to a specific VLAN made up of voice devices such as IP phones, VoIP endpoints, and voice systems, the Voice Virtual Local Area Network (VLAN) is used.The switch can detect and add port members to the Voice VLAN automatically, as well as assign the configured Quality of Service (QoS) to packets from the Voice VLAN. IP routers are required to provide communication between voice devices that are in different Voice VLANs.

Organizationally Unique Identifiers (OUI) can be used to add a specific manufacturer's Media Access Control (MAC) address to the OUI table. The first three bytes of the MAC address contain a manufacturer identifier, while the last three bytes contain a unique station ID. Once the OUIs are added to the table, any voice received from a specific IP phone on the ports of the voice VLAN ports is forwarded on the voice VLAN, provided that IP phone is listed in the OUI table

The source MAC address of a received packet is checked by the switch to determine whether it is a voice packet. The source MAC address of VoIP traffic contains a preconfigured OUI prefix. You can manually enter MAC addresses and descriptions for specific manufacturers into the OUI table. All traffic received on the Voice VLAN ports from a specific IP phone with a listed OUI is routed to the Voice VLAN.

To configure Telephony OUI and/or add a new Voice VLAN OUI follow these steps:

Procedure

Step 1

Click VLAN Management > Voice VLAN > Telephony OUI.

The Telephony OUI page contains the following fields:

  • Telephony OUI Operational Status—Displays whether OUIs are used to identify voice traffic.

  • CoS/802.1p—Select the CoS queue to be assigned to voice traffic.

  • Remark CoS/802.1p—Select whether to remark egress traffic.

  • Auto Membership Aging Time—Enter the time delay to remove a port from the voice VLAN after all of the MAC addresses of the phones detected on the ports have aged out.

Step 2

Click Apply to update the Running Configuration of the device with these values.

Step 3

Click Restore Default OUIs to delete all of the user-created OUIs, and leave only the default OUIs in the table. A pop-up will appear with the following message " All User-defined OUIs will be erased. Do you want to continue?" Click OK.

To delete all the OUIs, select the top checkbox. All the OUIs are selected and can be deleted by clicking Delete. If you then click Restore Default OUIs, the system recovers the known OUIs.

Step 4

To add a new OUI, click Add.

Step 5

Enter the values for the following fields:

  • Telephony OUI—Enter a new OUI.

  • Description—Enter an OUI name.

Step 6

Click Apply. The OUI is added to the Telephony OUI Table.