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User’s Manual of SGSD-1022 / SGSD-1022P
SGSW-2840 / SGSW-2840P
590
5.21.8 Configuring Voice VLANs
The switch allows you to specify a Voice VLAN for the network and set a CoS priority for the VoIP traffic. 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
to the Voice VLAN. Alternatively, switch ports can be manually configured.
Command Function Mode
voice vlan Defines the Voice VLAN ID GC
voice vlan aging Configures the aging time for Voice VLAN ports GC
voice vlan mac-address Configures VoIP device MAC adresses GC
switchport voice vlan Sets the Voice VLAN port mode IC
switchport voice vlan rule Sets the automatic VoIP traffic detection method for ports IC
switchport voice vlan security Enables Voice VLAN security on ports IC
switchport voice vlan priority Sets the VoIP traffic priority for ports IC
show voice vlan Displays Voice VLAN settings PE
Table 5-74 Voice VLAN Commands
voice vlan
This command enables VoIP traffic detection and defines the Voice VLAN ID. Use the no form to disable the Voice VLAN.
Syntax
voice vlan voice-vlan-id
no voice vlan
voice-vlan-id - Specifies the voice VLAN ID. (Range: 1-4094)
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
• 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 can provide higher voice quality by preventing excessive packet
delays, packet loss, and jitter. This is best achieved by assigning all VoIP traffic to a single Voice 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 global auto-detection status is enabled (see the switchport voice vlan