13-5
Cisco ONS 15310-MA SDH Procedure Guide, Release 9.1 and Release 9.2
78-19416-01
Chapter 13 Add and Remove Nodes
Before You Begin
Step 1
Draw a diagram of the path protection configuration where you will remove the node. In the diagram,
identify the following:
•
The node that is connected through its west port to the node that will be removed (the target node)
•
The node that is connected through its east port to the target node
Step 2
Log into a node in the network where you want to remove a path protection node. See the
Log into CTC” task on page 16-43
for instructions.
Step 3
Complete the
“DLP-H163 Check the Network for Alarms and Conditions” task on page 17-56
to verify
that the path protection configuration is free of alarms. If trouble is indicated (for example, a major alarm
exists), resolve the problem before proceeding. See
or, if necessary, refer
to the
Cisco ONS 15310-MA SDH Troubleshooting Guide
.
Step 4
Complete the
“DLP-H115 Delete Circuits” task on page 17-19
for circuits that originate or terminate in
the target node. (If a circuit has multiple drops, delete only the drops that terminate on the node you are
deleting.)
Step 5
Complete the
“DLP-H168 Verify Pass-Through Circuits” task on page 17-59
to verify that circuits
passing through the target node enter and exit the node on the same VC high-order path or VC low-order
path.
Step 6
Complete the
“DLP-H166 Initiate a Path Protection Force Switch on a Span” task on page 17-58
for all
spans connected to the node you are removing.
Step 7
Remove all fiber connections between the target node and the two neighboring nodes.
Step 8
Reconnect the fiber of the two neighboring nodes directly, west port to east port.
Note
If you delete a node that was in a login node group, you will see partial circuits for that node in
CTC network view. (Although it is no longer part of the ring, the removed node still reports to
CTC until it is no longer in a login node group.)
Step 9
Exit CTC and log back in. See the
“DLP-H29 Log into CTC” task on page 16-43
for instructions.
Step 10
Log into each newly connected node and open the
Alarms
tab.
a.
Verify that the alarm filter is not on. See the
“DLP-H88 Disable Alarm Filtering” task on
as necessary.
b.
Verify that the trunk cards/ports are free of alarms. Resolve any alarms before proceeding. Refer to
the
Cisco ONS 15310-MA SDH Troubleshooting Guide
.
Step 11
Complete the
“DLP-H140 Verify Timing in a Reduced Ring” task on page 17-43
.
Step 12
Complete the
“DLP-H167 Clear a Path Protection Force Switch” task on page 17-59
.
Step 13
Click the
Circuits
tab and verify that no partial circuits are present.
Step 14
(Optional) Complete the
“NTP-H32 Path Protection Acceptance Test” procedure on page 4-11
Stop. You have completed this procedure.
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