Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?


Configuring Layer 2 Circuit Transport Mode on ATM MICs


To configure Layer 2 circuit AAL5 or Layer 2 circuit cell relay, perform the following tasks:

  • For Layer 2 circuit AAL5 mode, configure logical interface encapsulation by including the encapsulation statement, specifying the atm-ccc-vc-mux encapsulation type:

    You can include this statement at the following hierarchy levels:

    • [edit interfaces interface-name unit logical-unit-number]

    • [edit logical-systems logical-system-name interfaces interface-name unit logical-unit-number]

  • For Layer 2 circuit cell-relay mode, configure physical interface encapsulation by including the encapsulation statement at the [edit interfaces interface-name] hierarchy level, specifying the atm-ccc-cell-relay encapsulation type:

    You can also include the encapsulation atm-ccc-cell-relay statement at the [edit interface interface-name unit logical-unit-number] hierarchy level.

    When you use the configuration given in the preceding steps, keep the following points in mind:

    • The chassis-level configuration for atm-l2-circuit-mode is not available for ATM MICs.

    • The absence of the chassis-level configuration for atm-l2-circuit-mode does not indicate null control word.

For more information about Layer 2 circuits, see the Junos OS VPNs Library for Routing Devices and the Junos OS Routing Protocols Library.