Huawei S1720&S2700&S3700&S5700&S6700 Switch VLAN Termination and Voice VLAN

VLAN Termination
Involved Network Elements
Other network elements are not required.

License Support
VLAN termination, that is, QinQ and Dot1q on a sub-interface, is a basic feature of a switch
and is not under license control.

Feature Dependencies and Limitations

• Termination sub-interfaces cannot be configured on an Eth-Trunk member interface. 
• You are advised to add member interfaces to an Eth-Trunk and configure termination sub-interfaces on the Eth-Trunk in sequence. Termination sub-interfaces can be configured successfully on an Eth-Trunk only when the device where member interfaces reside support termination sub-interfaces.
• The VLAN IDs terminated by a sub-interface cannot be created in the system view or be displayed using a display command.
• When VLAN IDs terminated by a sub-interface are used for Layer 3 forwarding, only the first VLAN takes effect even if multiple inner VLAN IDs are specified.
• VLAN termination sub-interfaces cannot be created on a VCMP client.
• The VLAN terminated by a sub-interface cannot be configured as a super-VLAN or sub VLAN.
• If the PW-side interface is a Layer 3 interface switched by the undo portswitch command, the AC-side interface cannot be a subinterface belonging to a Layer 3 interface; otherwise, traffic forwarding is abnormal. This rule applies to Huawei S6720-EI, S6720S-EI and S5720EI.

Voice VLAN

Involved Network Elements

Other network elements are not required.

License Support

The voice VLAN can be available only after the S1720GW, S1720GWR, S1720GW-E, and

S1720GWR-E have the license loaded. The S1720GW-E and S1720GWR-E have the preconfigured

license before delivery. CFM is available on other models without loading the license.

Feature Dependencies and Limitations

• 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 S5720-HI do not support the automatic mode.
• 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.
• In V200R003 and later versions, the automatic mode takes effect only when the voicevlan 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 in V200R008, if the services conflict:

– For S5720HI, the priority configured using the remark (user group view)

command takes effect.

– For S5720-EI and S6720EI, the priority configured using the voice-vlan remark

command takes effect.