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Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
July 2010
Chapter 2 Alarm Troubleshooting
2.8.2 Protection Switching, Lock Initiation, and Clearing
The Circuits on Span dialog box shows the SNCP circuits, including circuit names, locations, and a color
code showing which circuits are active on the span.
Step 3
Click the
Perform SNCP span switching
field.
Step 4
Choose
Manual
from the drop-down list.
Step 5
Click
Apply
.
Step 6
In the Confirm SNCP Switch dialog box, click
Yes
.
Step 7
In the Protection Switch Result dialog box, click
OK
.
In the Circuits on Span dialog box, the switch state for all circuits is Manual. Unprotected circuits do
not switch.
Initiate a Lock Out of Protect Switch for All Circuits on an SNCP Span
This procedure prevents all circuits in an SNCP working span from switching to the protect span. It is
used to keep traffic off cards that originate or terminate SNCP circuits.
Caution
The Lock Out of Protect overrides normal protective switching mechanisms.
Step 1
Log into a node on the network. If you are already logged in, continue with
.
Step 2
Right-click a network span and choose
Circuits
.
The Circuits on Span dialog box shows the SNCP circuits, including circuit names, locations, and a color
code showing which circuits are active on the span.
Step 3
Click the
Perform SNCP span switching
field.
Step 4
Choose
Lock Out of Protect
from the drop-down list.
Step 5
Click
Apply
.
Step 6
In the Confirm SNCP Switch dialog box, click
Yes
.
Step 7
In the Protection Switch Result dialog box, click
OK
.
In the Circuits on Span dialog box, the switch state for all circuits is FORCE. Unprotected circuits do
not switch.
Clear a SNCP Span External Switching Command
Note
If the ports terminating a span are configured as revertive, clearing a Force or Manual switch to protect
moves traffic back to the working port. If ports are not configured as nonrevertive, clearing a Force
switch to protect does not move traffic back.
Step 1
Log into a node on the network. If you are already logged in, continue with
.
Step 2
Right-click a network span and choose
Circuits
.
Summary of Contents for Cisco ONS 15600 SDH
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