Configuring a port to operate in automatic voice VLAN assignment mode
Configuration restrictions and guidelines
When you configure a port to operate in automatic voice VLAN assignment mode, follow these restrictions and guidelines:
Do not configure a VLAN as both a voice VLAN and a protocol-based VLAN. A voice VLAN in automatic mode on a hybrid port processes only tagged incoming voice traffic. A protocol-based VLAN on a hybrid port processes only untagged incoming packets. For more information about protocol-based VLANs, see "Configuring protocol-based VLANs."
As a best practice, do not use the automatic voice VLAN assignment mode together with MSTP. In MSTP mode, if a port is blocked in the MSTI of the target voice VLAN, the port drops the received packets instead of delivering them to the CPU. As a result, the receiving port will not be dynamically assigned to the voice VLAN.
As a best practice, do not use the automatic voice VLAN assignment mode together with PVST. In PVST mode, if the target voice VLAN is not permitted on a port, the port is placed in blocked state. The received packets are dropped instead of being delivered to the CPU. As a result, the receiving port will not be dynamically assigned to the voice VLAN.
As a best practice, do not configure both dynamic MAC-based VLAN assignment and automatic voice VLAN assignment mode on a port. If you have to configure both of them on a port, configure dynamic MAC-based VLAN assignment first. If you configure them in a reverse order, conflict will occur. When you remove one of the configurations, the operation of the other is affected.
Configuration procedure
To configure a port to operate in automatic voice VLAN assignment mode:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. (Optional.) Set the voice VLAN aging timer. | voice-vlan aging minutes | By default, the aging timer of a voice VLAN is 1440 minutes. The voice VLAN aging timer takes effect only on ports in automatic voice VLAN assignment mode. |
3. (Optional.) Enable the voice VLAN security mode. | voice-vlan security enable | By default, the voice VLAN security mode is enabled. |
4. (Optional.) Add an OUI address for voice packet identification. | voice-vlan mac-address oui mask oui-mask [ description text ] | By default, system default OUI addresses exist. For more information, see Table 11. |
5. Enter Layer 2 Ethernet interface view. | interface interface-type interface-number | N/A |
6. Configure the link type of the port. |
| N/A |
7. (Optional.) Configure the port to operate in automatic voice VLAN assignment mode. | voice-vlan mode auto | By default, the automatic voice VLAN assignment mode is enabled. |
8. Enable the voice VLAN feature on the port. | voice-vlan vlan-id enable | By default, the voice VLAN feature is disabled. |