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ProSafe XSM7224S Managed Stackable Switch CLI Manual, Software Version 9.0
Switching Commands 3-50
v1.0, November 2010
Voice VLAN Commands
This section describes the commands you use for Voice VLAN. Voice VLAN enables switch ports
to carry voice traffic with defined priority so as to enable separation of voice and data traffic
coming onto the port. The benefits of using Voice VLAN is to ensure that the sound quality of an
IP phone could be safeguarded from deteriorating when the data traffic on the port is high.
Also the inherent isolation provided by VLANs ensures that inter-VLAN traffic is under
management control and that network- attached clients cannot initiate a direct attack on voice
components. QoS-based on IEEE 802.1P class of service (CoS) uses classification and scheduling
to sent network traffic from the switch in a predictable manner. The system uses the source MAC
of the traffic traveling through the port to identify the IP phone data flow.
voice vlan (Global Config)
Use this command to enable the Voice VLAN capability on the switch.
Format show dvlan-tunnel [interface {<unit/slot/port> | all}]
Mode • Privileged EXEC
• User EXEC
Term Definition
Interface Valid slot and port number separated by forward slashes.
Mode The administrative mode through which Double VLAN Tunneling can be enabled or
disabled. The default value for this field is disabled.
EtherType A 2-byte hex EtherType to be used as the first 16 bits of the DVLAN tunnel. There are
three different EtherType tags. The first is 802.1Q, which represents the commonly used
value of 0x8100. The second is vMAN, which represents the commonly used value of
0x88A8. If EtherType is not one of these two values, then it is a custom tunnel value,
representing any value in the range of 0 to 65535.
Default disabled
Format voice vlan
Mode Global Config