Cisco ONS 15327 User Documentation page 362

Span Upgrades
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/intermediate-reach card.
Note
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 UPSR
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 span that you will upgrade:
a.
b.
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:
a.
b.
c.
Remove the fiber from both endpoints (nodes) on the span and ensure that traffic is still running.
Step 3
Remove the OC-N cards from both endpoints. If you are performing a span upgrade from OC-12 cards
Step 4
to OC-48 cards, proceed to Step 5. If you are performing a span upgrade from IR cards to LR cards of
the same type; for example, OC-12 IR to OC-12 LR, proceed to Step 8.
For both endpoints, in node view, right-click on each OC-N slot and choose Change Card.
Step 5
In the Change Card dialog box, choose the new OC-N type.
Step 6
Click OK.
Step 7
Step 8 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.
Step 9 When cards at both span endpoints have been successfully upgraded and all the facility alarms (LOS, SD
or SF) are cleared, remove the forced switch:
a.
b.
c.
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/intermediate-reach card.
Cisco ONS 15327 User Documentation, R3.3
12-16
You cannot downgrade if circuits exist on the STSs that you will remove (the higher STSs).
In node view, click on the Alarms tab to view a list of current alarms.
In node view, click on the Conditions tab and click the Retrieve Conditions button to view a list
of current conditions.
In network view, right-click the span and choose Circuits.
From the Circuits on Span dialog box in the Switch All UPSR Circuits Away field, choose FORCE.
Click Apply.
In network view, right-click the span and choose Circuits.
From the Circuits on Span dialog box in the Switch All UPSR Circuits Away field choose CLEAR.
Click Apply.
Chapter 12 Maintenance
June 2002