Switching Commands
63
ProSAFE M7100 Managed Switches
show dvlan-tunnel
Use this command without the optional parameters to display all interfaces enabled for Double
VLAN Tunneling. Use the optional parameters to display detailed information about Double VLAN
Tunneling for the specified interface or all interfaces.
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 to enable separation of voice and data traffic coming
onto the port. The benefits of using a voice VLAN are to ensure that the sound quality of an IP
phone is 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 contr
ol 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 {<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 v
alue 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
diff
erent 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, it is a custom tunnel value, representing any value
in the range of 0–65535.
Default disabled
Format voice vlan
Mode Global Config
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