Black Box LGB6026A, Management Manual

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C
HAPTER
38 | VLAN Commands
Configuring Voice VLANs
Table 110: Voice VLAN Commands (Continued)
Command Function Mode
switchport voice vlan rule Sets the automatic VoIP traffic detection method for IC
ports
switchport voice vlan
security
Enables Voice VLAN security on ports
IC
show voice vlan Displays Voice VLAN settings PE
voice vlan
This command enables VoIP traffic detection and defines the Voice VLAN
ID. Use the
no form to disable the Voice VLAN.
S
YNTAX
voice vlan voice-vlan-id
no voice vlan
voice-vlan-id - Specifies the voice VLAN ID. (Range: 1-4093)
D
EFAULT
S
ETTING
Disabled
C
OMMAND
M
ODE
Global Configuration
C
OMMAND
U
SAGE
◆
When IP telephony is deployed in an enterprise network, it is
recommended to isolate the Voice over IP (VoIP) network traffic from
other data traffic. Traffic isolation helps prevent excessive packet
delays, packet loss, and jitter, which results in higher voice quality. This
is best achieved by assigning all VoIP traffic to a single VLAN.
◆
VoIP traffic can be detected on switch ports by using the source MAC
address of packets, or by using LLDP (IEEE 802.1AB) to discover
connected VoIP devices. When VoIP traffic is detected on a configured
port, the switch automatically assigns the port as a tagged member of
the Voice VLAN.
◆
Only one Voice VLAN is supported and it must already be created on the
switch before it can be specified as the Voice VLAN.
◆
The Voice VLAN ID cannot be modified when the global auto-detection
status is enabled (see the
switchport voice vlan command.
E
XAMPLE
The following example enables VoIP traffic detection and specifies the Voice
VLAN ID as 1234.
Console(config)#voice vlan 1234
Console(config)#