Cisco ONS 15327, User Documentation

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Cisco ONS 15327 User Documentation, R3.3
June 2002
Chapter 12 Maintenance
Span Upgrades
Note
Remember to attach the fiber after installing the OC-N cards.
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 at both span endpoints (nodes) on the span that you will upgrade first:
a. At the first endpoint, 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 .
d.
At the second endpoint, in node view, click the Maintenance > Ring tabs.
e.
Click either the West Switch or the East Switch field and choose FORCE RING from the menu.
f.
Click Apply .
Step 3 Remove the fiber from both endpoints 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 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. Wait for the
IMPROPRMVL alarm to clear and the cards to become active.
Step 9 When cards at both endpoints have been successfully upgraded and all the facility alarms (LOS, SD or
SF) are cleared, remove the forced switch from both endpoints on the upgraded span:
a.
At the first endpoint, in node view, click the Maintenance > Ring tabs.
b. Click the West Switch or the East Switch field and choose CLEAR from the menu.
c.
Click Apply .
d.
At the second endpoint, in node view, click the Maintenance > Ring tabs.
e.
Click the West Switch or the East Switch field and choose CLEAR from the menu.
f. Click Apply .