7-7
Cisco ONS 15600 SDH Reference Manual, Release 9.0
78-18400-01
Chapter 7 Circuits and Tunnels
7.2.3 Circuit States
7.2.3 Circuit States
The circuit service state is an aggregate of the cross-connect states within the circuit.
•
If all cross-connects in a circuit are in the Unlocked-enabled service state, the circuit service state
is Unlocked.
•
If all cross-connects in a circuit are in the Locked-enabled,maintenance, Locked-enabled,disabled
service state, or the Unlocked-disabled,automaticInService state, the circuit service state is Locked.
•
Partial is appended to the Locked circuit service state when circuit cross-connect state are mixed and
not all in the Unlocked-enabled service state. The Locked-partial state can occur during automatic
or manual transitions between states. The Locked-partial service state can appear during a manual
transition caused by an abnormal event such as a CTC crash or communication error, or if one of the
cross-connects could not be changed. Refer to the
Cisco ONS 15600 SDH Troubleshooting Guide
for troubleshooting procedures. The Locked-partial circuit state does not apply to optical channel
network connection (OCHNC) circuit types.
You can assign a service state to circuit cross-connects at two points:
•
During circuit creation, you can set the state on the Create Circuit wizard.
•
After circuit creation, you can change a circuit state in the Edit Circuit window or from the
Tools > Circuits > Set Circuit State menu.
Note
After you have created an initial circuit in a CTC session, the subsequent circuit states default to the
circuit state of the initial circuit, regardless of which nodes in the network the circuits traverse or the
node.ckt.state default setting.
During circuit creation, you can apply a service state to the drop ports in a circuit. You cannot transition
a port from the Unlocked-enabled service state to the Locked-enabled,disabled state. You must first
transition the port to the Locked-enabled,maintenance state before changing it to the
Locked-enabled,disabled state. For more information about port service state transitions, see
Appendix B, “Administrative and Service States.”
Circuits do not use the soak timer, but ports do. The soak period is the amount of time that the port
remains in the Unlocked-disabled,automaticInService service state after a signal is continuously
received. When the cross-connects in a circuit are in the Unlocked-disabled,automaticInService service
state, the ONS 15600 SDH monitors the cross-connects for an error-free signal. It changes the state of
the circuit from Locked to Unlocked or to Locked-partial as each cross-connect assigned to the circuit
path is completed. This allows you to provision a circuit using TL1, verify its path continuity, and
prepare the port to go into service when it receives an error-free signal for the time specified in the port
soak timer.
PENDING_MERGE
Any new circuits created to represent an alternate path in a
topology upgrade are set to this status to indicate that it is a
temporary circuit. These circuits can be deleted if a topology
upgrade fails. For more information about topology
upgrades, see
Chapter 8, “SDH Topologies and Upgrades.”
DROP_PENDING
A circuit is set to this status when a new circuit drop is being
added.
Table 7-2
ONS 15600 SDH Circuit Status (continued)
Status
Definition/Activity
