Voice VLAN Constraints
The following constraints exist:
In addition the following constraints are applicable for Telephony OUI:
- The Voice VLAN cannot be VLAN1 (the default VLAN).
- The Voice VLAN cannot be Smartport enabled.
- The Voice VLAN cannot support DVA (Dynamic VLAN assignment).
- A new VLAN ID can be configured for the Voice VLAN only if the current Voice VLAN does not have candidate ports.
- The interface VLAN of a candidate port must be in General or Trunk mode.
- The Voice VLAN QoS decision has priority over any other QoS decision, except for the Policy decision.
- The Voice VLAN QoS is applied to candidate ports that have joined the Voice VLAN, and to static ports.
- The voice flow is accepted if the MAC address can be learned by the Forwarding Database (FDB). (If there is no free space in FDB, no action occurs).