Chapter 7 Circuits and Tunnels

Circuit Properties

Table 7-1

ONS 15310-MA SDH Circuit Status (continued)

 

 

 

Status

 

Definition/Activity

 

 

PENDING_MERGE

Any new circuits created to represent an alternate path in a topology

 

 

upgrade are set to this status to indicate that the circuit is temporary.

 

 

These circuits can be deleted if a topology upgrade fails. For more

 

 

information about in-service topology upgrades, see Chapter 9, “SDH

 

 

Topologies and Upgrades.”

 

 

DROP_PENDING

A circuit is set to this status when a new circuit drop is being added.

 

 

 

7.2.2 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 In-Service (unlocked).

If all cross-connects in a circuit are in an Out-of-Service (locked) service state, such as locked-enabled,maintenance; Out-of-Service and Autonomous, Automatic In-Service (locked-disabled,Automatic In Service); or Out-of-Service and Management, Disabled (locked-enabled,disabled), the circuit service state is locked.

PARTIAL is appended to the locked circuit service state when circuit cross-connect states are mixed and not all states are unlocked-enabled. The locked-PARTIAL state can occur during automatic or manual transitions between states. locked-PARTIAL 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 15310-MA SDH Troubleshooting Guide for troubleshooting procedures.

You can assign a 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

adrop port from the unlocked-enabled service state to the locked-enabled,disabled service state; you must first put the port in 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 locked-disabled,Automatic In Service service state after a signal is continuously received. When the cross-connects in a circuit are in the locked-disabled,Automatic In Service service state, the ONS 15310-MA SDH monitor 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

Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2

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Cisco Systems 15310-MA manual Circuit States, Pendingmerge, Information about in-service topology upgrades, see , SDH

15310-MA specifications

Cisco Systems has established itself as a leader in the networking domain, offering a wide array of solutions to meet the needs of modern businesses. Among its impressive product lineup are the Cisco 15310-CL and 15310-MA routers, designed to provide advanced network performance and reliability.

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