Users Guide

Network Administration: VLAN 157
FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Dell Astute\User
Guide\Dell_Astute_Network_Admin_VLAN.fm
DELL CONFIDENTIAL – PRELIMINARY 8/9/16 - FOR PROOF ONLY
VoIP phones transmits IP traffic with a pre-configured Organizational Unique
Identifier (OUI) prefix in the source MAC address. This enables the switch to
dynamically identify ports connected to VoIP equipment and automatically
add these ports to the Voice VLAN.
VoIP phones use one of the following modes, both of which are supported by the
device:
• Use only tagged packets for all communications.
• Initially use untagged packets while retrieving the initial IP address
through DHCP. Then use the Voice VLAN and start sending tagged VoIP
packets.
Non-VoIP traffic is dropped from the Voice VLAN when the device is in Auto
Voice VLAN secured mode.
The Voice VLAN feature provides QoS actions to VoIP, ensuring that the
quality of voice does not deteriorate if IP traffic is received unevenly.
To summarize, when Voice VLAN is enabled and configured, and VoIP
equipment is connected to one of the switch ports, the VoIP traffic triggers
the switch’s Voice VLAN feature to add this port to the Voice VLAN, and to
assign traffic from this port a specific QoS profile, ensuring high voice quality.
The device supports a single voice VLAN.
Properties
To set voice VLAN parameters that apply to the voice VLAN on the device:
1
Click Network Administration > VLAN > Voice VLAN > Properties .
2 Click Edit and enter the fields:
–
Voice VLAN State — Select Enable/Disable to active/deactivate the
Voice VLAN feature on the device.
–
Voice VLAN ID — Select the VLAN that is to be the voice VLAN.
–
Class of Service — Select to add a CoS level to untagged packets,
received on the voice VLAN. The possible values are 0 to 7, where 7 is
the highest priority. 0 is used as a best-effort, and is invoked
automatically when no other value has been set.
–
Remark CoS — Select Enable to use the Remark CoS feature.
–
Voice VLAN Aging Time — Enter the interval of time after which the
port exits the voice VLAN, if no voice packets are received.