Cisco ONS 15454 SDH E1-75 Manuel - Sayfa 32
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11.17.1 Rolls Window
Figure 11-14
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
•
•
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.
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. You cannot cancel the roll after you complete the roll.
•
Force Valid Signal—Forces a roll onto the Roll To Circuit destination without a valid signal. If you
choose Force Valid Signal, traffic on the circuit that is involved in the roll will be dropped when the
roll is completed.
Cisco ONS 15454 SDH Reference Manual, R8.5
11-32
Rolls Window
–
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. When the valid signal status is
true, the Automatic mode switches the traffic to the Roll To Path and completes the roll
automatically.
Manual—You must complete a manual roll after a valid signal is received. One-way destination
–
rolls are always manual. When the valid signal status is true, the Manual mode switches the
traffic to the Roll To Path.
"11.17.2 Roll Status" section on page 11-33
Chapter 11 Circuits and Tunnels
for information.
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