Name: Cisco ONS 15454 DWDM
Brand: Cisco
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Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1

78-17742-02

Chapter 1 General Troubleshooting

1.12.3 OCHNC Circuits Creation Failure

Note If this is not possible and the new value of Span Loss cannot be modified, log into the Technical

Support Website at http://www.cisco.com/techsupport for more information or call Cisco TAC

(1 800 553-2447) in order to report a service-affecting problem

Step 9 For the two fibers belonging to the repaired span, identify the fiber for the east to west (E–W) line

direction.

Step 10 Repeat the procedure from Step 6 to Step 8 for the E–W direction.

1.12.3 OCHNC Circuits Creation Failure

OCHNC circuit creation is managed by the Cisco Wavelength Path Provisioning (WPP) network

application. The WPP application helps prevent errors during new circuit activation (if the wavelength

is already allocated in the path between source and destination) and also guarantees an appropriate time

interval between one circuit activation and the next to enable proper amplifier gain regulation by APC.

WPP uses the network topology information carried by the OSC link among different nodes to identify

the routing path of the optical wavelength (OCHNC circuits) from the source node to the destination

node. WPP also enables the card ports of the OCHNC circuits by changing the administrative state from

the default (OOS or Locked) state to the final (IS or Unlocked) state.

1.12.3.1 Prerequisites for Successful OCHNC Circuit Creation

The prerequisite conditions for successfully completed circuit creation are:

1. Internode: OSC link active among all DWDM nodes involved

2. Internode: APC enabled (or alternatively manually disabled by the user)

3. Intranode: Logical connections among cards created and provisioned on every node of the network

(ANS completed)

OCHNC circuit creation is successfully completed when the CTC circuit table reports the situation

shown in Figure 1-29.

• The Circuit Status has turned to DISCOVERED.

• The # of spans field shows the correct number of hops among different nodes that the OCHNC

circuit passes through to reach the final destination.

• Circuit State reports IS (or unlocked).

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