Defining the Connection for Switching Cross-Connects
To configure Layer 2 switching cross-connects, define the connection between the two circuits. You configure this on the router that is acting as the switch (Router B in Layer 2 Switching Circuit Cross-Connect). The connection joins the interface that comes from the circuit’s source to the interface that leads to the circuit’s destination. When you specify the interface names, include the logical portion of the name, which corresponds to the logical unit number. The cross-connect is bidirectional, so packets received on the first interface are transmitted out the second interface, and those received on the second interface are transmitted out the first interface.