Cisco ONS 15327 Procedure Manual page 376

NTP-B95 Upgrade Optical Spans Manually
Apply a Force switch on the ports that you will upgrade, beginning with the protect port:
Step 2
In node view, click the Maintenance > Protection tabs.
a.
Under Protection Groups, choose the 1+1 protection group.
b.
Under Selected Group, choose the protect port (regardless if it is active or standby).
c.
From Switch Commands, click Force.
d.
e. Click Yes on the confirmation dialog box.
Note
Note
Step 3 Repeat
Step 4 Remove the fiber from both ends of the span and ensure that traffic is still running.
Remove the OC-N cards from both span endpoints.
Step 5
At one endpoint, in node view, right-click the OC-N slot and choose Change Card.
Step 6
In the Change Card dialog box, choose the new OC-N card type.
Step 7
Click OK.
Step 8
Repeat Steps
Step 9
Install the new OC-N cards in both endpoints before attaching the fiber to the newly installed OC-N
Step 10
cards, check that the receive signal falls within the acceptable range. Wait for the IMPROPRMVL alarm
to clear and the cards to become standby.
When cards on each end of the span have been successfully upgraded and all the facility alarms (LOS,
Step 11
SD or SF) are cleared, remove the Force switch:
In node view, click the Maintenance > Protection tabs.
a.
Under Protection Groups, choose the 1+1 protection group.
b.
Under Selected Group, choose the port with the force on it.
c.
d. From Switch Commands, click Clear.
e. Click Yes on the confirmation dialog box.
The Force switch clears and traffic is running. If you have lost traffic, make sure the cabling is installed
properly. See the
the problem, perform a downgrade. The procedure for downgrading is the same as upgrading except that
you choose a lower-rate card in Step
Step 12 Repeat this task for any other spans in the 1 + 1 linear configuration.
Step 13 Return to your originating procedure (NTP).
Cisco ONS 15327 Procedure Guide, R4.0
11-10
If the switching mode is bidirectional in the 1+1 protection group, apply the Force command to
only one end of the span. If the Force command is applied to both ends when the switching mode
is bidirectional, a switch of more than 50 ms in duration will result.
A Force switch request on a span or card (port) causes CTC to raise a FORCED-REQ condition.
It is informational only; the condition will clear when the force switch command is cleared.
Step 2 for each port you will upgrade.
5 through 7 at the second endpoint.
"NTP-B221 Install Optical Cables" procedure on page
7 and install a lower-rate card in Step 9.
Chapter 11 Upgrade Cards and Spans
1-40. If this does not resolve
March 2003