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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 networks
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 allows you to interoperate an ONS 15454
unidirectional path switched ring (UPSR) with third-party equipment UPSRs.