Configuring Voice Vlan - 3Com 3CRDSF9PWR-US - OfficeConnect Managed Fast Ethernet PoE Switch User Manual

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HAPTER ONFIGURING
Configuring Voice
VLAN
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UALITY OF ERVICE
The Voice VLAN allows network administrators to enhance VoIP service by
configuring ports to carry IP voice traffic from IP phones on a specific
VLAN. VoIP traffic has a preconfigured OUI prefix in the source MAC
address. Network Administrators can configure a VLAN on which voice IP
traffic is forwarded. Non-VoIP traffic is dropped from the Voice VLAN in
auto Voice VLAN secure mode . Voice VLAN also provides QoS to VoIP
traffic, ensuring that the quality of voice does not deteriorate if IP traffic is
received unevenly. The system supports one Voice VLAN.
There are two operational modes for IP Phones:
IP phones are configured with VLAN-mode as enabled, ensuring that
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tagged packets are used for all communications.
If the IP phone's VLAN-mode is disabled, the phone uses untagged
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packets. The phone uses untagged packets while retrieving the initial
IP address through DHCP. The phone eventually uses the Voice VLAN
and starts sending tagged packets.
This section contains the following topics:
Viewing Voice VLAN
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Defining Voice VLAN
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Defining Voice VLAN Port Settings
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Viewing Voice VLAN Port Definitions
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Viewing the OUI Summaries
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Modifying OUI Definitions
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