Specifications

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Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 3 Maintenance
Span Upgrades
3.12.2 Manual Span Upgrades
Manual Span Upgrades are mainly provided as error recovery for the Span Upgrade Wizard, but they can
be used to perform span upgrades. Downgrading can be performed to back out of a span upgrade. The
procedure for downgrading is the same as upgrading except that you choose a lower-rate card type.You
cannot downgrade if circuits exist on the STSs that will be removed (the higher STSs).
Choose from four manual span upgrade options:
• “Perform a Manual Span Upgrade on a Two-Fiber BLSR” procedure on page 3-25
• “Perform a Manual Span Upgrade on a Four-Fiber BLSR” procedure on page 3-26
• “Perform a Manual Span Upgrade on a UPSR” procedure on page 3-27
• “Perform a Manual Span Upgrade on a 1+1 Protection Group” procedure on page 3-28
Note During the upgrade some minor alarms and conditions will be raised and will clear automatically.
There should be no service-affecting (SA, Major, or Critical) alarms. If any service-affecting alarms
occur, Cisco recommends backing out of the procedure.
BLSR Out of Sync alarms will be raised during span upgrades and will clear when the upgrade of all
nodes is complete. Allow extra time for a large BLSR to clear all of the Out of Sync alarms.
Note If any of the cross connect cards reboot during the span upgrade, you must manually reset the card
once the span upgrade procedure is completed on all the nodes in the ring.
Procedure: Perform a Manual Span Upgrade on a Two-Fiber BLSR
All spans connecting the nodes in a BLSR must be upgraded before the added bandwidth is 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 the Alarms tab to view a list of current alarms.
b. In network view, click 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 span that you will upgrade first:
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 span endpoints (nodes) and ensure that traffic is still running.
Step 4 Remove the OC-N cards from both endpoints.
Step 5 From both 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 Install the new OC-N cards in both endpoints and attach the fiber to the cards.