Chapter 17 DLPs E100 to E199

DLP- E101 Apply a Lock On in a 1+1 Group

If the Force switch is successful, CTC shows both ports as [FORCE TO PROTECT] (or

[FORCE TO WORKING]). This indication is shown whether or not the ONS 15600 system has been able to move traffic from one port to the other.

If the Bidirectional switching check box is checked, both the near-end and far-end nodes switch to the designated protection ports. For example, if the near-end node has a loss of signal (LOS), it switches to the protection port and transmits a switch request to the far-end node to switch to the protection port also. This ensures that both nodes process traffic from the same span.

If the Bidirectional switching check box is not selected, the near-end and far-end nodes switch independently of each other. For example, if the near-end node has an LOS on its working port, it switches to the protection port. If the far-end node does not have a LOS, traffic remains on the working port.

If the Force switch is unsuccessful, clear the switch immediately using the “DLP-E167 Clear a Manual or Force Switch in a 1+1 Protection Group” task on page 17-53, and then troubleshoot the problems preventing the switch by referring to the Cisco ONS 15600 Troubleshooting Guide.

Step 5 Click the Conditions tab and click Retrieve to see new events. The switch procedure raises a FORCED-REQ-SPAN condition that is visible in the window unless Not Alarmed conditions have been filtered out from the view.

Step 6 Click the Alarms tab.

No new traffic loss alarms or failure-to-switch alarms should appear.

Step 7 Return to your originating procedure (NTP).

DLP-E101 Apply a Lock On in a 1+1 Group

Purpose

This task locks traffic onto a working port to prevent traffic from

 

switching to the protect port in a protection group.

Tools/Equipment

None

Prerequisite Procedures

DLP-E26 Log into CTC, page 16-33

Required/As Needed

As needed

Onsite/Remote

Onsite or remote

Security Level

Provisioning or higher

Note A lock on can be applied to a working port only.

Step 1 In node view, click the Maintenance > Protection tabs.

Step 2 In the Protection Groups area, select the protection group where you want to apply a lock on.

Step 3 If you determine that the protect port is in standby and you want to apply the lock on to the protect port, make the protect port active:

a.In the Selected Group field, click the protect port.

b.In the Switch Commands field, click Force.

Step 4 In the Selected Group area, choose the active port where you want to lock on traffic. Step 5 In the Inhibit Switching field, click Lock On.

Cisco ONS 15600 Procedure Guide, R8.0

17-2

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Cisco Systems 15600 manual DLP-E101 Apply a Lock On in a 1+1 Group, 17-2

15600 specifications

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