25.1.3 Notes on using VLAN tunneling

(1) Coexistence with other functions

See "22.3 Coexistence of Layer 2 switch function and other functions".

(2) About Defaults VLAN

Because default VLANs are not automatically installed, set all VLANs explicitly.

(3) About Native VLAN for Trunked Ports

The trunk port for VLAN tunneling is the port that stacks VLAN tags, but VLAN tags are not stacked with a native VLAN. When frames are sent from the Switch, operation is the same as that for an access port, and when frames are received, only untagged frames are handled. Because this operation is different than other VLANs, native VLANs cannot be used as the VLAN for the backbone line of a VLAN-tunneled network. When VLAN tunneling is used, we recommend that you suspend the native VLAN for the trunk port.

The native VLAN for the trunk port is the default VLAN unless set otherwise using the switchport trunk native vlan configuration command. When using VLAN tunneling functionality for the default VLAN, use the switchport trunk native vlan command to set a VLAN other than the default VLAN for the native VLAN.

(4) About Frame User Priority

For User Priority on using VLAN tunneling, refer to the Configuration Guide Vol.2" "3.7 Markers Description.