Managed Switch CLI Manual, Release 8.0.3
Switching Commands 3-49
v1.0, July 2010
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.
no voice vlan (Global Config)
Use this command to disable the Voice VLAN capability on the switch.
voice vlan (Interface Config)
Use this command to enable the Voice VLAN capability on the interface.
You can configure Voice VLAN in one of three different ways:
Default disabled
Format voice vlan
Mode Global Config
Format no voice vlan
Mode Global Config
Default disabled
Format voice vlan {<id> | dot1p <priority> | none | untagged}
Mode Interface Config
Parameter Description
dot1p Configure the IP phone to use 802.1p priority tagging for voice traffic and to use the
default native VLAN (VLAN 0) to carry all traffic. Valid <priority> range is 0 to 7.
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