3com 5500-ei pwr Installation Instruction

 

1-10 

Configure the 
voice VLAN to be 
the default VLAN 
of the port 

port trunk pvid vlan vlan-id

port hybrid pvid vlan 
vlan-id 

Optional 

Refer to 

determine whether or 
not this operation is 
needed. 

 

z 

The voice VLAN function can be enabled for only one VLAN at one time. 

z 

If the Link Aggregation Control Protocol (LACP) is enabled on a port, voice VLAN feature cannot be 

enabled on it. 

z 

Voice VLAN function can be enabled only for the static VLAN. A dynamic VLAN cannot be 

configured as a voice VLAN. 

z 

When ACL number applied to a port reaches to its threshold, voice VLAN cannot be enabled on 

this port. You can use the display voice vlan error-info command to locate such ports.  

z 

When a voice VLAN operates in security mode, the device in it permits only the packets whose 

source addresses are the identified voice OUI addresses. Packets whose source addresses 

cannot be identified, including certain authentication packets (such as 802.1x authentication 

packets), will be dropped. Therefore, you are suggested not to transmit both voice data and service 

data in a voice VLAN. If you have to do so, make sure that the voice VLAN does not operate in 

security mode. 

z 

The voice VLAN legacy feature realizes the communication between 3Com device and other 

vendor's voice device by automatically adding the voice VLAN tag to the voice data coming from 

other vendors’ voice device. The voice vlan legacy command can be executed before voice VLAN 

is enabled globally and on a port, but it takes effect only after voice VLAN is enabled globally and 

on the port. 

 

To assign a trunk port or a hybrid port to the voice VLAN, refer to VLAN Configuration of this manual for 

the related command. 

 

Display information about the ports on which voice 
VLAN configuration fails 

Display the voice VLAN configuration status 

Display the OUI list 

Display the ports operating in the voice VLAN 

display vlan vlan-id 

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