Defining the Encapsulation for Layer 2 TCC Switching

To begin implementation of Layer 2 TCC switching, configure TCC encapsulation on the desired interfaces of the router that is acting as the switch (Router B in Figure 72).

NOTE: You cannot configure standard protocol families on TCC or CCC interfaces. Only the CCC family is allowed on CCC-encapsulated interfaces. Likewise, only the TCC family is allowed on TCC-encapsulated interfaces.

For ATM connections, specify the encapsulation type when configuring ATM virtual circuits (VCs) at the [edit interfaces interface-name unit unit-number] hierarchy level. For each VC, you configure whether it is a circuit or a regular logical interface. The default interface type is point-to-point.

[edit]

interfaces {

    at-fpc/pic/port {

        atm-options {

            vpi vpi-identifier maximum-vcs maximum-vcs;

        }

        unit logical-unit-number {

            point-to-point;                                 # This is the default interface type.

            encapsulation (atm-tcc-vc-mux | atm-tcc-snap);

            vci vpi-identifier.vci-identifier;

        }

    }

}

For Cisco HDLC and PPP circuits, specify the encapsulation in the encapsulation statement at the [edit interfaces interface-name] hierarchy level. This statement configures the entire physical device. Also, you must configure the logical interface unit 0.

[edit]

interfaces {

    type-fpc/pic/port {

        encapsulation (cisco-hdlc-tcc | ppp-tcc);

        unit 0;

    }

}

You can specify the encapsulation for Frame Relay circuits at the [edit interfaces interface-name] hierarchy level and the [edit interfaces interface-name unit unit-number] hierarchy level. For TCC and CCC interfaces, the DLCI value must be configured in the range of 512 through 1022. The default interface type is point-to-point.

[edit]

interfaces {

    type-fpc/pic/port {

        encapsulation frame-relay-tcc;

        unit logical-unit-number {

            point-to-point;                                 # This is the default interface type.

            encapsulation frame-relay-tcc;

            dlci dlci-identifier;

        }

    }

}