3Com 3CDSG10PWR User Guide - Page 182

182 CHAPTER 13: CONFIGURING QUALITY OF SERVICE Modifying OUI Definitions The Voice VLAN OUI Modify Page allows network administrators to add new OUIs or to remove previously defined OUIs from the Voice VLAN. The OUI is the first half (three most significant bytes) of the MAC address and is manufacturer specific, while the last three bytes contain a unique station ID. The packet priority derives from the source/destination MAC prefix. The packet gets higher priority when there is a match with the OUI list. Using the OUI, network managers can add a specific manufacturer's MAC addresses to the OUI table. Once the OUIs are added, all traffic received on the Voice VLAN ports from the specific IP phone with a listed OUI, is forwarded on the voice VLAN. To modify Voice VLAN OUI Settings: 1 Click Device > QoS > VoIP Traffic Setting > OUI Modify. The Voice VLAN OUI Modify Page opens: Figure 91 Voice VLAN OUI Modify Page The Voice VLAN OUI Modify Page contains the following fields: ■ Telephony OUI - Defines a new or existing OUI on the Voice VLAN. The field contains the 3 most significant bytes of the MAC address. ■ Description - Enters a user-defined OUI description. The field may contain up to 32 characters. ■ Add - Allows the user to add a new OUI. ■ Remove - Allows the user to delete an existing OUI.