LevelOne GSW-4876 - Manual (Page 180)

C HAPTER 4 | Configuring the Switch
Managing VoIP Traffic
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C ONFIGURING V O IP
T RAFFIC
Use the Voice VLAN Configuration page to configure the switch for VoIP
traffic. First enable automatic detection of VoIP devices attached to the
switch ports, then set the Voice VLAN ID for the network. The Voice VLAN
aging time can also be set to remove a port from the Voice VLAN when
VoIP traffic is no longer received on the port.
P ATH
Advanced Configuration, Voice VLAN, Configuration
P ARAMETERS
These parameters are displayed:
Global Configuration
◆ Mode 3 – Enables or disables Voice VLAN operation on the switch.
(Default: Disabled)
◆ VLAN ID – Sets the Voice VLAN ID for the network. Only one Voice
VLAN is supported on the switch. (Range: 1-4095; Default: 1000)
The Voice VLAN cannot be the same as that defined for any other
function on the switch, such as the management VLAN (see "Setting an
IPv4 Address" on page 46 ), the MVR VLAN (see "Multicast VLAN
Registration" on page 139 ), or the native VLAN assigned to any port
(see "Configuring VLAN Attributes for Port Members" on page 170 ).
◆ Aging Time – The time after which a port is removed from the Voice
VLAN when VoIP traffic is no longer received on the port. (Range: 10-
10,000,000 seconds; Default: 86400 seconds)
◆ Traffic Class – Defines a service priority for traffic on the Voice VLAN.
The priority of any received VoIP packet is overwritten with the new
priority when the Voice VLAN feature is active on a port. (Range: 0-7;
Default: 7)
The switch provides eight priority queues for each port. For information
on how these queues are used, see "Configuring Egress Port Scheduler"
on page 186 .
Port Configuration
◆ Mode – Specifies if the port will be added to the Voice VLAN.
(Default: Disabled)
■
Disabled – The Voice VLAN feature is disabled on the port. The port
will not detect VoIP traffic or be added to the Voice VLAN.
■
Auto 3 – The port will be added as a tagged member to the Voice
VLAN when VoIP traffic is detected on the port. You must select a
method for detecting VoIP traffic, either OUI or LLDP (802.1ab).
3. MSTP must be disabled before the Voice VLAN is enabled (see "Configuring Global
Settings for STA" on page 128 ), or the Voice VLAN port mode is set to Auto or Forced.
This prevents the spanning tree’s ingress filter from dropping VoIP traffic tagged for the
Voice VLAN.