Configuring TCC and Layer 2.5 Switching

Translational cross-connect (TCC) is a switching concept that allows you to establish interconnections between a variety of Layer 2 protocols or circuits. It is similar to its predecessor, CCC. However, while CCC requires the same Layer 2 encapsulations on both sides of a routing platform (such as Point-to-Point Protocol [PPP] or Frame Relay-to-Frame Relay), TCC lets you connect different types of Layer 2 protocols interchangeably. With TCC, combinations such as PPP-to-ATM and Ethernet-to-Frame Relay cross-connections are possible.

You can configure the following Layer 2.5 switching properties:

• Configuring VLAN TCC Encapsulation
• Configuring an Ethernet TCC or VLAN TCC

For examples of Layer 2.5 switching configuration, see the following sections:

• Example: Configuring an Ethernet TCC or Extended VLAN TCC
• Example: Configuring Extended VLAN Encapsulation