14-17
Cisco ONS 15454 Procedure Guide, R5.0
December 2004
Chapter 14 Add and Remove Nodes
NTP-A313 Remove an In-Service Node from a Linear ADM
NTP-A313 Remove an In-Service Node from a Linear ADM
Note The 1+1 protection group must be unidirectional in order to delete a node from a linear ADM. If your
1+1 protection group is bidirectional, see the “DLP-A154 Modify a 1+1 Protection Group” task on
page 18-22 to change it to unidirectional. After you have removed the node from the linear group, you
can change the protection setting back to bidirectional.
Step 1 Complete the “DLP-A60 Log into CTC” task on page 17-66 at a node in the network where you will
remove the node.
Step 2 From the View menu, choose Go to Network View.
Step 3 Click the Alarms tab.
a. Verify that the alarm filter is not on. See the “DLP-A227 Disable Alarm Filtering” task on
page 19-17 as necessary.
b. Verify that no unexplained alarms appear on the network. If unexplained alarms appear, resolve
them before continuing. Refer to the Cisco ONS 15454 Troubleshooting Guide if necessary.
Step 4 Click the Conditions tab. Verify that no unexplained conditions appear on the network. If unexplained
conditions appear, resolve them before continuing. Refer to the Cisco ONS 15454 Troubleshooting
Guide if necessary.
Step 5 On the network map, double-click a node in the 1+1 protection group that is adjacent to the node you
intend to remove from the group (the target node).
Step 6 In node view, click the Maintenance > Protection tabs.
Step 7 Initiate a Force switch on the working port:
a. In the Protection Groups area, click the 1+1 protection group.
b. In the Selected Group area, click the working port.
c. Next to Switch Commands, click Force.
d. In the Confirm Force Operation dialog box, click Yes .
e. In the Selected Group area, verify that the following appears:
–
Protect port - Protect/Active [FORCE_SWITCH_TO_PROTECT] [PORT STATE]
–
Working port - Working/Standby [FORCE_SWITCH_TO_PROTECT], [PORT STATE]
Step 8 Repeat Step 5 through Step 7 for the node that is connected directly to the other side of the target node.
Step 9 Remove the fiber from the working ports of the target node.
Step 10 Connect the fiber between the working ports of the two nodes that were directly connected to either side
of the target node.
Purpose This procedure removes a node from a linear ADM without losing
traffic.
Tools/Equipment None
Prerequisite Procedures NTP-A38 Provision a Linear ADM Network, page 5-6
Required/As Needed As needed
Onsite/Remote Onsite
Security Level Provisioning or higher
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