20-3
Cisco ONS 15454 Procedure Guide, R5.0
March 2005
Chapter 20 DLPs A300 to A399
DLP-A303 Initiate a BLSR Force Ring Switch
DLP-A303 Initiate a BLSR Force Ring Switch
Caution The Force Switch Away command overrides normal protective switching mechanisms. Applying this
command incorrectly can cause traffic outages.
Caution Traffic is not protected during a Force protection switch.
Step 1 From the View menu, choose Go to Network View.
Step 2 Click the Provisioning > BLSR tabs.
Step 3 Click Edit.
Step 4 To apply a Force switch to the west line:
a. Right-click the west BLSR port where you want to switch the BLSR traffic and choose
Set West Protection Operation.
Note If node icons overlap, drag and drop the icons to a new location. You can also return to
network view and change the positions of the network node icons, because BLSR node icons
are based on the network view node icon positions.
Note For two-fiber BLSRs, the squares on the node icons represent the BLSR working and protect
channels. You can right-click either channel. For four-fiber BLSRs, the squares represent
ports. Right-click either working port.
b. In the Set West Protection Operation dialog box, choose FORCE RING from the drop-down list.
Click OK.
c. Click Yes in the two Confirm BLSR Operation dialog boxes that appear.
On the network graphic, an F appears on the working BLSR channel where you invoked the protection
switch. The span lines change color to reflect the forced traffic. Green span lines indicate the new BLSR
path, and the lines between the protection switch are purple.
Performing a Force switch generates several conditions including FORCED-REQ-RING and WKSWPR.
Step 5 To apply a Force switch to the east line:
a. Right-click the east BLSR port and choose Set East Protection Operation.
Purpose Use this task to perform a BLSR Force switch on a BLSR port. A Force
ring switch will switch traffic off a span if there is no SD, SF, or lockout
switch present on the span.
Tools/Equipment None
Prerequisite Procedures DLP-A60 Log into CTC, page 17-66
Required/As Needed As needed
Onsite/Remote Onsite
Security Level Provisioning or higher
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