Voice VLAN and automatic VoIP can handle voice traffic, but automatic VoIP can distinguish the types of voice traffic in more detail and process them. Today, the editor will talk about the difference between the two~
1.OUI information setting
When the data packet reaches the port with Voice VLAN enabled, switch will detect whether the traffic is voice traffic based on its OUI information.
But the automatic VoIP function does not require setting the OUI information of the IP phone, as it does not recognize voice traffic by reading its OUI information.
2. Create Voice VLAN
When setting up the Voice VLAN application topology, we only need to create a Voice VLAN ID and select the uplink port in the VLAN feature. There is no need to add a port connecting to the IP phone when creating a VLAN.
Unlike Voice VLANs, Auto VoIP requires adding the port connected to the IP phone to the target VLAN and setting the port's Egress rules when creating a VLAN in the VLAN function.
3. Priority for Voice Traffic Settings
Usually, when setting up Voice VLAN/Auto VoIP, we set priority information for voice traffic to ensure priority transmission in case of congestion.
Voice VLAN can only set 802.1p priority for traffic, while Auto VoIP can support setting 802.1p priority and DSCP at the same time.
To sum up, the purpose of these two functions is to isolate voice traffic from other data traffic, and then put QoS tags on voice traffic. These two features can be enabled on ports that transmit only voice traffic or simultaneously transmit voice traffic and data traffic.
