12-16
Cisco ONS 15327 User Documentation, R3.3
June 2002
Chapter 12 Maintenance
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
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 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.
In node view, click on the
Alarms
tab to view a list of current alarms.
b.
In node 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 span that you will upgrade:
a.
In network view, right-click the span and choose
Circuits
.
b.
From the Circuits on Span dialog box in the Switch All UPSR Circuits Away field, choose
FORCE
.
c.
Click
Apply
.
Step 3
Remove the fiber from both endpoints (nodes) on the span and ensure that traffic is still running.
Step 4
Remove the OC-N cards from both endpoints. If you are performing a span upgrade from OC-12 cards
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.
Step 5
For 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. 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.
In network view, right-click the span and choose
Circuits
.
b.
From the Circuits on Span dialog box in the Switch All UPSR Circuits Away field choose
CLEAR
.
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/intermediate-reach card.
Summary of Contents for ONS 15327
Page 22: ...Contents xxii Cisco ONS 15327 User Documentation June 2002 I N D E X ...
Page 30: ...Figures xxviii Cisco ONS 15327 User Documentation June 2002 ...
Page 44: ...Procedures xlii Cisco ONS 15454 Installation and Operations Guide R3 2 June 2002 ...
Page 540: ...Glossary GL 16 Cisco ONS 15327 User Documentation R3 3 June 2002 ...