Configuring Flexible VLAN Tagging on PTX Series Packet Transport Routers
This topic describes how to configure flexible VLAN tagging on PTX Series Packet Transport Routers. In addition to VLAN tagging and stacked VLAN tagging, you can configure a port for flexible tagging. With flexible VLAN tagging, you can configure two logical interfaces on the same Ethernet port, one with single-tag framing and one with dual-tag framing.
To configure mixed tagging, include the flexible-vlan-tagging statement at the [edit interfaces et-fpc/pic/port ] hierarchy level. You must also include the vlan-tags statement with inner and outer options or the vlan-id statement at the [edit interfaces et-fpc/pic/port unit logical-unit-number] hierarchy level: