VoIP configuration notes

  • This feature works with any VoIP phone that:
    • Runs CDP
    • Sends a VoIP VLAN query message
    • Can configure its voice VLAN after receiving the VoIP VLAN reply
  • Automatic configuration of a VoIP phone will not work if one of the following applies:
    • You do not configure a voice VLAN ID for a port with a VoIP phone
    • You remove the configured voice VLAN ID from a port without configuring a new one
    • You remove the port from the voice VLAN
  • Make sure the port is able to intercept CDP packets (cdp run command).
  • Some VoIP phones may require a reboot after configuring or re-configuring a voice VLAN ID. For example, if your VoIP phone queries for VLAN information only once upon boot up, you must reboot the VoIP phone before it can accept the VLAN configuration. If your phone is powered by a PoE device, you can reboot the phone by disabling then re-enabling the port.
Parent topic: Dynamic configuration of Voice over IP (VoIP) phones