CHAPTER
6-1
Cisco ONS 15454 Installation and Operations Guide
November 2001
6
Circuits and Tunnels
This chapter explains how to create and administer Cisco ONS 15454 circuits and tunnels, which
includes:
•Creating standard STS and VT1.5 circuits
•Creating VT tunnels
•Creating multiple drop circuits
•Creating monitor circuits
•Editing UPSR circuits
•Creating path traces to monitor traffic
•Reviewing ONS 15454 cross-connect card capacities
•Creating DCC tunnels to tunnel third-party equipment through ONS 15454 ne tworks

6.1 Circuits Overview

You can create STS and VT1.5 circuits across and within ONS 15454 nodes and assign different
attributes to circuits, for example:
•Create one-way, two-way, or broadcast circuits.
•Assign user-defined names to circuits.
•Assign different circuit sizes. STS circuits can be STS-1, STS-3c, STS-12c, STS-48c, or STS-192c.
Ethernet circuits can be STS-1, STS-3c, STS-6c, or STS-12c. (To create Ethernet circuits see the
“Provision a Shared Packet Ring” procedure on page 9-10.)
•Route circuits automatically or manually.
•Automatically create multiple circuits.
•Require the circuit path to be fully protected.
•Require protected source and destination cards and ports.
•Define a secondary circuit source or destination that allow s you to in terope ra te an O NS 1545 4
unidirectional path switched ring (UPSR) with third-party equipment UPSRs.