Two Circuit Bridge And Roll; Protected Circuits; Merge Circuits - Cisco ONS 15600 Reference Manual

Chapter 7 Circuits and Tunnels
If a new segment is created on Nodes 3 and 4 using the Bridge and Roll wizard, the created circuit has
Note
the same name as the original circuit with the suffix _ROLL**. The circuit source is on Node 3 and the
circuit destination is on Node 4.

7.12.4 Two Circuit Bridge and Roll

When using the bridge and roll feature to reroute traffic using two circuits, the following constraints
apply:
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7.12.5 Protected Circuits

CTC allows you to roll the working or protect path regardless of which path is active. You can upgrade
an unprotected circuit to a fully protected circuit or downgrade a fully protected circuit to an unprotected
circuit with the exception of a path protection circuit. When using bridge and roll on path protection
circuits, you can roll the source or destination or both path selectors in a dual roll. However, you cannot
roll a single path selector.

7.13 Merge Circuits

A circuit merge combines a single selected circuit with one or more circuits. You can merge
CTC-created circuits and TL1-created circuits. To merge circuits, you choose a circuit in the
CTC Circuits window and the circuits that you want to merge with the chosen (master) circuit on the
Merge tab in the Edit Circuit window. The Merge tab shows only the circuits that are available for
merging with the master circuit:
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DCC must be enabled on the circuits involved in a roll before roll creation.
A maximum of two rolls can exist between any two circuits.
If two rolls are involved between two circuits, both rolls must be on the original circuit. The second
circuit should not carry live traffic. The two rolls loop from the second circuit back to the original
circuit. The roll mode of the two rolls must be identical (either automatic or manual).
If a single roll exists on a circuit, you must roll the connection onto the source or the destination of
the second circuit and not an intermediate node in the circuit.
Circuit cross-connects must create a single, contiguous path.
Circuits types must be a compatible.
Circuit directions must be compatible. You can merge a one-way and a two-way circuit, but not two
one-way circuits in opposing directions.
Circuit sizes must be identical.
Circuit end points must send or receive the same framing format.
The merged circuits must become a DISCOVERED circuit.
7.12.4 Two Circuit Bridge and Roll
Cisco ONS 15600 Reference Manual, R6.0
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