Licensing Requirements and Limitations for Voice VLAN
Involved Network Elements
Other network elements are not required.
Licensing Requirements
The voice VLAN is a basic feature of a switch and is not under license control.
Version Requirements
Product |
Product Model |
Software Version |
|---|---|---|
S12700 |
S12708, S12712 |
V200R005C00, V200R006C00, V200R007C00, V200R007C20, V200R008C00, V200R009C00, V200R010C00, V200R011C10 |
S12710 |
V200R010C00, V200R011C10 |
|
S12704 |
V200R008C00, V200R009C00, V200R010C00, V200R011C10 |
Feature Limitations
The switch XGE interface connected to ET1D2IPS0S00, ET1D2FW00S00, ET1D2FW00S01, ET1D2FW00S02, or ACU2 does not support voice VLAN.
VLAN 1 cannot be configured as a voice VLAN.
To transmit different services, ensure that the voice VLAN and default VLAN on an interface are different VLANs.
Only one VLAN on an interface can be configured as a voice VLAN at a time.
After a voice VLAN is configured on an interface, VLAN mapping, VLAN stacking, or traffic policies cannot be configured on the interface.
- Do not set the VLAN ID to 0 on an IP phone.
- The automatic mode is not supported on the X series cards on modular switches.
- In auto mode, access, negotiation-auto, or negotiation-desirable interfaces cannot be added to a voice VLAN. To add the interface to the voice VLAN, run the port link-type command to change the link type of the interface to trunk or hybrid.
- When an IP phone is connected to a switch through the OUI-based voice VLAN, disable LLDP on the interface. If LLDP is enabled on the interface, the switch will allocate a voice VLAN ID to the IP phone. The IP phone sends tagged packets to the switch, whereas the switch sends untagged packets to the IP phone. As a result, the IP phone cannot go online.
- The automatic mode takes effect only when the voice-vlan remark-mode mac-address command is configured to increase the priority of voice packets based on MAC addresses and the voice-vlan enable command without include-untagged specified is configured to enable voice VLAN on the interface.
When the remark (user group view) and voice-vlan remark commands are used together to modify the user packet priority, if the services conflict:
- For X series cards, the priority configured using the remark (user group view) command takes effect.
- For the non-X series cards, the priority configured using the voice-vlan remark command takes effect.