Polycom CX5500

Polycom CX5500 Unified Conference Station Administrator’s Guide 1.1.0
Polycom, Inc. 223
Assign a VLAN ID Using DHCP
In deployments where is not possible or desirable to assign a VLAN statically in the phone’s network
configuration menu or use CDP (Cisco Discovery Protocol) or LLDP (Link-Layer Discovery Protocol) to
assign a VLAN ID, it is possible to assign a VLAN ID to the phone by distributing the VLAN ID via DHCP.
When using this method to assign the phone’s VLAN ID, the phone first boots on the default VLAN (or
statically configured VLAN, if first configured in the phone’s network configuration menu), obtains its
intended VLAN ID from the DHCP offer, then continues booting (including a subsequent DHCP
sequence) on the newly obtained VLAN.
See the figure VLAN Using DHCP Phone Boot Up Sequence for the phone boot-up sequence when
assigning a VLAN ID via DHCP.