Netgear M4100-12GF (GSM7212F) - ProSAFE Gigabit L2+ Managed Switch Guía Del Software

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.

Privileged EXEC

User EXEC

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 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.

Use this command to enable the Voice VLAN capability on the switch.

Format

show dvlan-tunnel [interface {<slot/port> | all}]

Mode

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, it is a custom tunnel value, 
representing any value in the range of 0–65535.

Default

disabled

Format

voice vlan

Mode

Global Config