Datasheet

11-29
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 11 Circuits and Tunnels
11.16.1 Rolls Window
11.16.1 Rolls Window
The Rolls window lists information about a rolled circuit before the roll process is complete. You can
access the Rolls window by clicking the Circuits > Rolls tabs in either network or node view.
Figure 11-13 shows the Rolls window.
Figure 11-13 Rolls Window
The Rolls window information includes:
• Roll From Circuit—The circuit with connections that will no longer be used when the roll process
is complete.
• Roll To Circuit—The circuit that will carry the traffic when the roll process is complete. The Roll
To Circuit is the same as the Roll From Circuit if a single circuit is involved in a roll.
• Roll State—The roll status; see the “11.16.2 Roll Status” section on page 11-30 for information.
• Roll Valid Signal—If the Roll Valid Signal status is true, a valid signal was found on the new port.
If the Roll Valid Signal status is false, a valid signal was not found. It is not possible to get a true
Roll Valid Signal status for a one-way destination roll.
• Roll Mode—The mode indicates whether the roll is automatic or manual.
CTC implements a roll mode at the circuit level. TL1 implements a roll mode at the cross-connect
level. If a single roll is performed, CTC and TL1 behave the same. If a dual roll is performed, the
roll mode specified in CTC might be different than the roll mode retrieved in TL1. For example, if
you select Automatic, CTC coordinates the two rolls to minimize possible traffic hits by using the
Manual mode behind the scenes. When both rolls have a good signal, CTC signals the nodes to
complete the roll.
– Automatic—When a valid signal is received on the new path, CTC completes the roll on the
node automatically. One-way source rolls are always automatic.
– Manual—You must complete a manual roll after a valid signal is received. One-way destination
rolls are always manual.
• Roll Path—The fixed point of the roll object.
• Roll From Path— The old path that is being rerouted.
• Roll To Path—The new path where the Roll From Path is rerouted.
• Complete—Completes a manual roll after a valid signal is received. You can complete a manual roll
if it is in a ROLL_PENDING status and you have not yet completed the roll or have not cancelled
its sibling roll.