Technical Documentation

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 inConfiguring TCC Interface Switching ).

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;}}}

Published: 2010-04-15