H3C S3100 Series Command Manual page 148

Command Manual (For Soliton) – Voice VLAN
H3C S3100 Series Ethernet Switches
Parameters
minutes: Sets the voice VLAN aging timer in minutes, in the range of 5 to 43200.
Description
Use the voice vlan aging command to set the voice VLAN aging timer.
Use the undo voice vlan aging command to restore the default.
By default, the voice VLAN aging timer is 1440 minutes.
If a port is configured to work in automatic voice VLAN assignment mode, the switch
automatically assigns the port to the voice VLAN when receiving a packet with the
source MAC address matching an entry in the OUI list of the switch. As soon as the port
is assigned to the voice VLAN, the voice VLAN aging timer starts. If no recognizable
voice traffic has been received before the timer expires, the port is removed from the
voice VLAN.
The voice VLAN aging timer does not take effect on ports working in manual voice
VLAN assignment mode, because these ports are assigned to the voice VLAN
statically.
When setting the voice VLAN aging timer, consider the usage frequency of IP phones.
Note that:
A large voice VLAN aging timer setting can prevent a port from being assigned to
or removed from the voice VLAN frequently, keeping voice communication stable.
However, this may cause a port to stay in the voice VLAN even if it has not
transmitted voice traffic for a long time, occupying system resources and bringing
about security problems. Therefore, you are recommended to set a large voice
VLAN aging timer in a network with credible network devices and many voice
applications.
A small voice VLAN aging timer enables the switch to remove a port that has not
transmitted voice traffic from the voice VLAN timely, thus improving network
security. However, this may cause the port to be assigned to or removed from the
voice VLAN frequently. Therefore, you are recommended to set a small voice
VLAN aging timer in a network with only a few voice applications.
Related commands: display voice vlan status.
Examples
# Set the aging time of the voice VLAN to 100 minutes.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] voice vlan aging 100
Chapter 1 Voice VLAN Configuration
1-6
Commands