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Chapter 7
Circuits and Tunnels
7.15 Reconfigured Circuits
You can reconfigure multiple circuits, which is typically necessary when a large number of circuits are
in the PARTIAL status. When you reconfigure multiple circuits, the selected circuits can be any
combination of DISCOVERED, PARTIAL, DISCOVERED_TL1, and PARTIAL_TL1 circuits. You
can reconfigure tunnels, CTC-created circuits, and TL1-created circuits. The Reconfigure command
maintains the names of the original cross-connects.
Use the CTC Tools > Circuits > Reconfigure Circuits command to reconfigure selected circuits. During
reconfiguration, CTC reassembles all connections of the selected circuits into circuits based on path size,
direction, and alignment. Some circuits might merge and others might split into multiple circuits. If the
resulting circuit is a valid circuit, it appears as a DISCOVERED circuit. Otherwise, the circuit appears
as a PARTIAL or PARTIAL_TL1 circuit.
Note
PARTIAL tunnel circuits do not split into multiple circuits during reconfiguration.
7.16 Server Trails
A server trail is a non-DCC link across a third-party network that connects two CTC network domains.
A server trail allows circuit provisioning when no DCC is available. You can create server trails between
any two optical or DS-3 ports. The end ports of a server trail can be different types. Server trails are not
allowed on DCC-enabled ports.
The server trail link is bidirectional and can be VT1.5, VT2, STS1, STS-3c, or STS-12c; you cannot
upgrade an existing server trail to another size. A server trail link can be one of the following protection
types: Preemptible, Unprotected, and Fully Protected. The server trail protection type determines the
protection type for any circuits that traverse it. PCA circuits will use server trails with the Preemptible
attribute.
When creating circuits or VCATs, you can choose a server trail link during manual circuit routing. CTC
may also route circuits over server trail links during automatic routing. VCAT common-fiber automatic
routing is not supported.
7.15 Reconfigured Circuits
Cisco ONS 15600 Reference Manual, R7.0
7-27
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