Configuring Vlans In The 4300T - Polycom V2IU 4300T User Manual

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User Guide V IU 4300T Converged Network Appliance
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Configuring VLANs in the 4300T

As depicted in the diagram below, VLANs are used to connect the 4300T to an
Ethernet switch that has been configured to use VLANs.
VLANid 1/2
VLANid 1/3
VLANid 1/2/3
802.1
Typically, all VoIP devices are placed in the same VLAN while data devices
are placed in a different VLAN. This is to ensure priority treatment of the VoIP
traffic on the LAN. Note that the 4300T does not require VLANs to prioritize
VoIP traffic; prioritization is determined by the VOS Application Layer
Gateway, regardless of VLAN. Some important notes about VLANs:
• A physical LAN port will operate in either 802.1 or 802.1q mode, not both
simultaneously
• The 4300T supports up to 16 VLANs
• A unique IP Subnet is assigned to each VLAN
• You can associate one or more VLANs to each LAN port operating in
802.1q mode
• Traffic within a VLAN is switched among all ports with membership
• Traffic between VLANs is routed by the 4300T
• The 4300T ALG can only be assigned to one VLAN id
— Only ALG traffic is prioritized over the WAN
— Other non-VoIP traffic in the same VLAN will not receive priority
treatment
• A DHCP server can be enabled/disabled per VLAN
• Cisco Discovery Protocol is not supported
VLAN
VLANid 1/2/3
Switch
(VLANid 16)
4300T
P1
WAN
P2
P3
P4
EM006