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Polycom Devices VLAN Overview and Recommendations
8x8 Support

Polycom Devices VLAN Overview and Recommendations

Overview

Polycom VLAN Defaults for Firmware 5.8+

Polycom VVX IP Phones natively will seek CDP and LLDP on boot.  Please refer to the Polycom Administration guide for VLAN parameters under “Virtual Local Area Network (VLAN) ID Assignment Using DHCP” for a full description on Polycom VLAN.  8x8’s current version is 5.9.4.3247.  

Recommendation and Advisory

The following is based on the Polycom Administration guide 5.9.0 under “Virtual Local Area Network (VLAN) ID Assignment Using DHCP".

If a VLAN tag is assigned by CDP or LLDP, DHCP VLAN tags are ignored.

  • 8x8's recommendation is to use Polycom's native CDP and or LLDP.
  • DHCP Discovery if used over CDP or LLDP, Both CDP and LLDP must be disabled at the Switch level.
  • There is no need to disable or modify Polycoms CDP or LLDP. If CDP and LLDP are disabled at the switch the Polycom will boot successfully with DHCP Discovery.

Additional Information

Assigning VLANs to Polycom devices that are outside the default settings from Polycom will require manually modifying each device. For this reason, 8x8 recommends using CDP/LLDP the default settings as described above. If opting for DVD, (VLAN ID Discovery over DHCP) Polycom natively examines for DHCP options 128, 144, 157, and 191 in that order for a valid Digital Versatile DVD Discovery string.