Ntp- D106 Remove An Sncp Node - Cisco ONS 15454 SDH Procedure Manual

Chapter 14 Add and Remove Nodes
The following procedure minimizes traffic outages during node removals.
Caution
If you remove a node that is the only BITS timing source for the ring, you also remove the only source
Caution
of synchronization for all the nodes in that ring. Circuits that connect to other networks which are
synchronized to a Stratum 1 clock will experience a high level of pointer adjustments, which might
adversely affect customer service.
Draw a diagram of the SNCP ring where you will remove the node. In the diagram, identify the
Step 1
following:
• The node that is connected through its west port to the node that will be removed.
The node that is connected through its east port to the node that will be removed.
•
Complete the
Step 2
remove a SNCP node.
Step 3 Complete the
that the SNCP ring is free of major alarms or problems. If trouble is indicated (for example, a major
alarm exists), resolve the problem before proceeding. See
refer to the Cisco ONS 15454 SDH Troubleshooting Guide.
Complete the
Step 4
terminate in the node you will remove. (If a circuit has multiple drops, delete only the drops that
terminate on the node you are deleting.)
Complete the
Step 5
passing through the node to be deleted enter and exit the node on the same VC4 and/or VC3 or VC12.
Complete the
Step 6
to the node you are removing.
Step 7 Remove all fiber connections between the node being removed and the two neighboring nodes.
Reconnect the fiber of the two neighboring nodes directly, west port to east port.
Step 8
If you delete a node that was in a login node group, you will see incomplete circuits for that node in the
Step 9
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.) Delete the node from the login node group:
a. From the CTC Edit menu, choose Preferences.
b. In the Preferences dialog box, click the Login Node Groups tab.
Click the login node group tab containing the node you want to remove.
c.
Click the node you want to remove, then click Remove.
d.
Click OK.
e.
Exit CTC and log back in. See the
Step 10
Log into each newly connected node and open the Alarms tab. Verify that the span cards are free of
Step 11
alarms. Resolve any alarms before proceeding. Refer to the Cisco ONS 15454 SDH Troubleshooting
Guide.
Step 12 Complete the
Complete the
Step 13
switch.
78-17194-01
"DLP-D60 Log into CTC" task on page 17-49
"DLP-D298 Check the Network for Alarms and Conditions" task on page 19-83
"DLP-D27 Delete Circuits" procedure on page 17-21
"DLP-D357 Verify Pass-Through Circuits" task on page 20-64
"DLP-D197 Initiate an SNCP Force Switch" task on page 18-84
"DLP-D60 Log into CTC" task on page 17-49
"DLP-D195 Verify Timing in a Reduced Ring" task on page
"DLP-D198 Clear an SNCP Force Switch" task on page 18-85

NTP- D106 Remove an SNCP Node

at a node in the network where you want to
Chapter 9, "Manage Alarms"
for circuits that originate or
to verify that circuits
for all spans connected
18-82.
to clear the protection
Cisco ONS 15454 SDH Procedure Guide, R7.0
to verify
or, if necessary,
for instructions.
14-13