Voice VLAN on Nebula.

Zyxel_Chris Posts: 660  Zyxel Employee
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Background: Voice VLAN is a feature that separates voice and data traffic on a network, ensuring optimal performance for voice communication. This is particularly important for VoIP (Voice over Internet Protocol) systems. In this guide, we will walk you through the steps to configure Voice VLAN on a Nebula switch.

Topology and Scenario: We will configure Voice VLAN on a Nebula switch within a business environment that uses VoIP phones. The goal is to ensure that voice traffic is prioritized and segregated from data traffic for better call quality.


  1. Log in to the Nebula control center using your account credentials.
  2. Navigate to Switch > Configure > VLAN.
  3. Click on the Add button to create a new VLAN for the Voice VLAN.
  4. Enter a name for the Voice VLAN and assign a VLAN ID.
  5. Select the Port Configuration tab and assign the switch ports that connect to VoIP phones to the Voice VLAN.
  6. Click Apply to save the VLAN configuration.
  7. Next, go to Switch > Configure > Port Configuration.
  8. Select the port type to Voice VLAN.
  9. Click Apply to save the port configuration.

Note: Ensure that the connected VoIP phones are configured to tag their traffic with the Voice VLAN ID. This setting is typically found in the phone's network configuration.

Verification and Noted:

  1. Verify Voice VLAN Configuration:
    • Connect a VoIP phone to a configured port.
    • Check the switch management interface to ensure the VoIP phone is associated with the Voice VLAN.
  2. Check QoS Settings:
    • Voice VLAN often works in conjunction with Quality of Service (QoS) settings.
    • Confirm that QoS is configured to prioritize Voice VLAN traffic.
  3. Test Voice Quality:
    • Place a test call and monitor call quality.
    • Ensure that voice traffic is prioritized over regular data traffic.
  4. Troubleshooting:
    • If any issues arise, refer to Nebula documentation or support resources.
    • Verify that both the switch and VoIP phone are correctly configured for Voice VLAN.

By following these steps, you can successfully configure Voice VLAN on your Nebula switch, enhancing the performance and quality of your VoIP communications.