Brocade Communications Systems Brocate Ethernet Access Switch 6910 - Manual (Page 462)

412 Brocade 6910 Ethernet Access Switch Configuration Guide
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Configuring Voice VLANs
20
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 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.
Example
The following example enables VoIP traffic detection and specifies the Voice VLAN ID as 1234.
Console(config)#voice vlan 1234
Console(config)#
voice vlan aging
This command sets the Voice VLAN ID time out. Use the no form to restore the default.
Syntax
voice vlan aging minutes
no voice vlan
minutes - Specifies the port Voice VLAN membership time out.
(Range: 5-43200 minutes)
Default Setting
1440 minutes
Command Mode
Global Configuration
Command Usage
The Voice VLAN aging time is the time after which a port is removed from the Voice VLAN when VoIP
traffic is no longer received on the port.
Example
The following example configures the Voice VLAN aging time as 3000 minutes.
Console(config)#voice vlan aging 3000
Console(config)#