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Cisco ONS 15454 Procedure Guide, R5.0
March 2005
Chapter 17 DLPs A1 to A99
DLP-A91 BLSR Switch Test
• The line states are shown as Stby/Stby on the east side of the node and Act/Act on the west side
of the node that is connected to the west line of the node where you invoked the Force Ring
switch.
• Verify that the line states are shown as Act/Act on both east and west sides of the remaining
nodes in the ring.
Step 8 From the View menu, choose Go to Network View.
Step 9 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 10 Display the BLSR window where you invoked the Force Ring switch (the window might be hidden by
the CTC window).
Step 11 Clear the switch on the west port:
a. Right-click the west port of the BLSR node where you invoked the Force Ring switch and choose
Set West Protection Operation.
b. In the Set West Protection Operation dialog box, choose CLEAR from the drop-down list.
c. Click OK.
d. Click Yes in the Confirm BLSR Operation dialog box.
On the network view graphic, the Force Ring switch is removed, the F indicating the switch is
removed, and the span lines between BLSR nodes will be purple and green. The span lines might
take a few moments to change color.
Step 12 From network view, click the Conditions tab. Verify that all conditions raised in this procedure are
cleared from the network. If unexplained conditions appear, resolve them before continuing.
Step 13 Verify the BLSR line status on each node:
a. From the View menu, choose Go to Node View.
a. Click the Maintenance > BLSR tabs.
b. Verify that the line states are shown as Act/Stby on both the east and west sides of each node in the
ring.
Step 14 Initiate a Force Ring switch on the east port:
a. Right-click the east port of BLSR node and choose Set East Protection Operation.
b. In the Set East Protection Operation dialog box, choose FORCE RING from the drop-down list.
c. Click OK.
d. Click Yes in the two Confirm BLSR Operation dialog boxes that appear.
On the network view graphic, an F appears on the working BLSR channel where you invoked the
Force Ring switch. The BLSR span lines are purple where the Force Ring switch was invoked, and
all span lines between other BLSR nodes are green. The span lines might take a few moments to
change color.
Step 15 Verify the conditions:
a. Click the Conditions tab.
b. Click Retrieve.
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