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3com 2928 User Guide

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1-4 
Voice VLAN working mode 
Packet type 
Packet processing mode 
Untagged packets 
Packets carrying the voice 
VLAN tag 
The port does not check the 
source MAC addresses of 
inbound packets. All types of 
packets can be transmitted in 
the voice VLAN. 
Normal mode 
Packets carrying other tags 
Forwarded or dropped 
depending on whether the port 
allows packets of these VLANs 
to pass through 
 
Configuring the Voice VLAN 
Configuration Task List 
Before configuring the voice VLAN, you must create the corresponding VLAN and configure the link 
type of each port to be assigned to the VLAN. As VLAN 1 is the system-default VLAN, you do not need 
to create it; however, you cannot configure it as the voice VLAN. For information about port link types, 
refer to Port Management Configuration.  
Configuring voice VLAN on a port in automatic voice VLAN assignment mode 
Perform the tasks described in 
 to configure the voice VLAN function on a port working in 
automatic voice VLAN assignment mode.  
Table 1-4 
Voice VLAN configuration task list for a port in automatic voice VLAN assignment mode 
Task 
Remarks 
Optional 
Configure the voice VLAN to operate in security mode and configure 
the aging timer  
Required 
Configure the voice VLAN assignment mode of a port as automatic and 
enable the voice VLAN function on the port.  
By default, the voice VLAN assignment mode of a port is automatic, 
and the voice VLAN function is disabled on a port.  
Optional 
The system supports up to 16 OUI addresses.  
By default, the system is configured with seven OUI addresses, as 
shown in 
.  
 
Configuring voice VLAN on a port working in manual voice VLAN assignment mode 
Perform the tasks described in 
 to configure the voice VLAN function on a port working in 
manual voice VLAN assignment mode.