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Chapter 11 Circuits and Tunnels

All connections from the master circuit and at least one connection from the other selected circuits must

be used in the resulting circuit for the merge to succeed. If a merge fails, the master circuit and all other

circuits remain unchanged. When the circuit merge completes successfully, the resulting circuit retains

the name of the master circuit.

11.19 Reconfigured Circuits

You can reconfigure multiple circuits, which is typically necessary when a large number of circuits are

in the PARTIAL state. When reconfiguring multiple circuits, the selected circuits can be any

combination of DISCOVERED, PARTIAL, DISCOVERED_TL1, or PARTIAL_TL1 circuits. You can

reconfigure VCTs, VCA circuits, VLAN-assigned circuits, VCAT circuits, 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.

If CTC cannot reconfigure all members in a VCAT circuit, the reconfigure operation fails for the entire

Note

VCAT circuit and it remains in the PARTIAL or PARTIAL_TL1 status. If CTC does reconfigure all

members in a VCAT circuit, the VCAT circuit may still remain in the PARTIAL or PARTIAL_TL1

status. This occurs if the ports defined in the VCAT termination do not match the source/drop ports of

the member circuits or if one or two VCAT terminations are missing.

Note

PARTIAL tunnel and PARTIAL VLAN-capable circuits do not split into multiple circuits during

reconfiguration.

11.20 Server Trails

A server trail is a non-DCC (logical or virtual) link across a third-party network that connects two CTC

network domains. A server trail allows A-Z circuit provisioning when no DCC is available. You can

create server trails between two distant optical or EC-1 ports. The end ports on a server trail can be

different types (for example, an OC-3 port can be linked to an OC-12 port). Server trails are not allowed

on DCC-enabled ports.

The server trail link is bidirectional and can be VT1.5, VT2, STS1, STS-3c, STS-6c, STS-12c, STS-48c,

or STS-192c; you cannot change an existing server trail to another size. It must be deleted and recreated.

A circuit provisioned over a server trail must match the type and size of the server trail it uses. For

example, an STS-3c server trail can carry only STS-3c circuits and not three STS-1 circuits.

There is no OSPF or any other management information exchange between NEs over a server trail.

Note

78-18119-01

11.19 Reconfigured Circuits

Cisco ONS 15454 SDH Reference Manual, R8.5

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