Specifications
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Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 3 Maintenance
Span Upgrades
Wait for the IMPROPRMVL alarm to clear and the cards to become active.
Step 9 When cards in both endpoint nodes have been successfully upgraded and all the facility alarms (LOS,
SD or SF) are cleared, remove the forced switch:
a. In node view, click the Maintenance > Ring tabs.
b. Click either the West Switch or the East Switch field and choose CLEAR from the menu.
c. Click Apply.
The forced switch clears and traffic is running. If you have lost traffic, perform a downgrade. The
procedure for downgrading is the same as upgrading except that you choose a lower-rate card.
Note You cannot downgrade if circuits exist on the STSs that you will remove (the higher STSs).
Step 10 Repeat these steps for each span in the BLSR.
When all spans in the BLSR have been upgraded, the span upgrade is complete.
Procedure: Perform a Manual Span Upgrade on a Four-Fiber BLSR
When upgrading a four-fiber BLSR, you can upgrade both working and protect lines with a single force
command. All spans in a BLSR must be upgraded before added bandwidth will be available.
Step 1 Ensure that no alarms or abnormal conditions (regardless of severity), including LOS, LOF, AIS-L, SF,
SD, and FORCED-REQ-RING are present on the BLSR that you will upgrade:
a. In network view, click on the Alarms tab to view a list of current alarms.
b. In network view, click on the Conditions tab and click the Retrieve Conditions button to view a
list of current conditions.
An unresolved alarm or abnormal condition is the most probable reason for upgrade failure.
Step 2 Apply a force switch on the lines that you will upgrade:
a. In node view, click the Maintenance > Ring tabs.
b. Click either the West Switch or the East Switch field and choose FORCE RING from the menu.
c. Click Apply.
Step 3 Remove the fiber from both working and protect cards at both span endpoints (nodes) and ensure that
traffic is still running.
Step 4 Remove the OC-N cards from both end points.
Step 5 For both ends of the span endpoints, in node view, right-click on each OC-N slot and choose Change
Card.
Step 6 In the Change Card dialog box, choose the new OC-N type.
Step 7 Click OK.
Step 8 When you have finished Steps 5 through 7 for both nodes, install the new OC-N cards in both endpoints
and attach the fiber to the cards.
Wait for the IMPROPRMVL alarm to clear and the cards to become active.