12-17
Cisco ONS 15327 User Documentation, R3.3
June 2002
Chapter 12 Maintenance
Span Upgrades
Note
You cannot downgrade if circuits exist on the STSs that you will remove (the higher STSs).
Procedure: Perform a Manual Span Upgrade on a 1+1 Protection Group
When upgrading a 1+1 group, upgrade the protect line first regardless of which line is active. Both lines
in a 1+1 group must be upgraded before the added bandwidth will be available.
Note
If the switching mode is bidirectional in the 1+1 protection group, apply the Force command to only
one end of the span, not both. The Clear command will apply to the end the Force was applied to. If
the Force command is applied to both ends when the switching mode is bidirectional, it will cause a
switch of more than 50 ms in duration.
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 ports that you will upgrade, beginning with the protect port:
a.
In node view, click the
Maintenance > Protection
tabs.
b.
Under Protection Groups, choose the 1+1 protection group.
c.
Under Selected Group, choose the protect port (regardless if it is active or standby).
d.
From Switch Commands, click
Force
.
e.
Click
Yes
on the confirmation dialog box.
Step 3
Repeat
for each port.
Step 4
Remove the fiber from both endpoints on the span and ensure that traffic is still running.
Step 5
Remove the OC-N cards from both span endpoints. If you are performing a span upgrade from OC-12
cards to OC-48 cards, proceed to Step 6. 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 9.
Step 6
At both ends of the span, in node view, right-click the OC-N slot and choose
Change Card
.
Step 7
In the Change Card dialog box, choose the new OC-N type.
Step 8
Click
OK
.
Step 9
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 standby.
Step 10
When cards on each end of the line have been successfully upgraded and all the facility alarms (LOS,
SD or SF) are cleared, remove the forced switch:
a.
In node view for either endpoint, click the
Maintenance > Protection
tabs.
b.
Under Protection Groups, choose the 1+1 protection group.
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 ...
