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Overview of TCC and Layer 2.5 Switching
Translational cross-connect (TCC) is a switching
concept that allows you to forward traffic 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.
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