IEEE 802.1p/Q

The phone tags all Ethernet packets it transmits with an 802.

1Q VLAN header when the following occurs:
  • A valid VLAN ID is specified in the phone's network configuration.
  • The phone is instructed to tag packets through Cisco Discovery Protocol (CDP) running on a connected Ethernet switch.
  • A VLAN ID is obtained from DHCP or LLDP