Cisco Cisco ONS 15600 SDH, Troubleshooting Manual

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Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
July 2010
Chapter 2 Alarm Troubleshooting
2.6.42 EOC
Step 4
When the LEDs on the STM-N cards are correctly illuminated, complete the “2.8.5 Verify or Create
Node DCC Terminations” procedure on page 2-139 .
Step 5 Repeat Step 4 at the adjacent nodes.
Step 6
If DCC is provisioned for the ends of the span, verify that the port is active and in service by completing
the following steps:
a. Confirm that the STM-N card shows a green LED in CTC or on the physical card.
A green SRV LED indicates an active card.
b. To determine whether the port is in service, double-click the card in CTC to display the card view.
c.
Click the Provisioning > Line tabs.
d. Verify that the Admin State column lists the port as Unlocked.
e.
If the Admin State column lists the port as Locked,maintenance or Locked,disabled, click the
column and click
Unlocked from the drop-down list. Click Apply .
Note
If ports managed into Unlocked administrative state are not receiving signals, the LOS alarm
is either raised or remains, and the port service state transitions to Unlocked-disabled,failed.
Step 7
For all nodes, if the card is in service, use an optical test set to determine whether signal failures are
present on fiber terminations. For specific procedures to use the test set equipment, consult the
manufacturer.
Caution Using an optical test set disrupts service on the STM-N card. It could be necessary to manually switch
traffic carrying circuits over to a protection path. Refer to the
“2.8.2 Protection Switching, Lock
Initiation, and Clearing” section on page 2-123 for commonly used switching procedures.
Step 8 If no signal failures exist on terminations, measure power levels to verify that the budget loss is within
the parameters of the receiver. See the
“1.9.3 Optical Traffic Card Transmit and Receive Levels” section
on page 1-74 for information.
Step 9
If budget loss is within parameters, ensure that fiber connectors are securely fastened and properly
terminated. For more information refer to the “Install Cards and Fiber-Optic Cable” chapter in the
Cisco ONS 15600 SDH Procedure Guide .
Step 10 If fiber connectors are properly fastened and terminated, complete the “Soft-Reset a Card Using CTC”
procedure on page 2-130 .
Wait ten minutes to verify that the card you reset completely reboots and becomes the standby card.
Resetting the active TSC card switches control to the standby TSC card. If the alarm clears when the
ONS 15600 SDH node switches to the standby TSC card, the user can assume that the previously active
card is the cause of the alarm.
Step 11
If the TSC card reset does not clear the alarm, delete the problematic RS-DCC termination by completing
the following steps:
a. From card view, click View > Go to Previous View if you have not already done so.
b.
Click the Provisioning > Comm Channels > RS-DCC tabs.
c. Highlight the problematic DCC termination.
d.
Click Delete .
e. Click Yes in the Confirmation Dialog box.