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Chapter 5
SONET Topologies
Click Status and choose In Service.
c.
d.
Click Apply.
e.
Repeat Steps a – d for each new OC-N card at each BLSR node.
Step 4
Connect the fiber to the new cards. Use the same east – west connection scheme that was used to create
the two-fiber connections.
Step 5
Test the new fiber connections using procedures standard for your site. For example, pull a Tx fiber for
a protect card and verify that an LOS alarm displays for the appropriate Rx card. Do this fiber test for
every span in the BLSR protect ring.
Perform a span lockout at each BLSR node:
Step 6
At one of the BLSR nodes, switch to node view. Click the Maintenance > Ring tabs.
a.
b.
Under West Switch for the two-fiber BLSR you will convert, select LOCKOUT SPAN. Click
Apply
Under East Switch, select LOCKOUT SPAN. Click Apply.
c.
d.
Repeat Steps a – c at each node in the two-fiber BLSR.
Step 7
Upgrade each node from two-fiber to four-fiber BLSR:
a.
At one of the BLSR nodes, switch to node view. Click the Provisioning > Ring tabs.
b.
Select the two-fiber BLSR. Click Upgrade.
c.
On the Upgrade BLSR dialog box, complete the following:
–
–
–
d.
Click Ok.
e.
Complete Steps a – d at each two-fiber BLSR node.
Step 8
Clear the span lockout:
a.
Display a BLSR node in node view. Click the Maintenance > Ring tabs.
b.
Under West Switch, select CLEAR. Click Apply
c.
Under East Switch, select CLEAR. Click Apply.
Repeat Steps a – c at each node in the new four-fiber BLSR.
d.
Switch to network view. Verify that no critical or major alarms are present, nor any facility alarms,
e.
such as LOS, LOF, AIS-L, SF, and SD. If an alarm is present, resolve the problem using procedures
in the Cisco ONS 15454 Troubleshooting and Maintenance Guide.
Step 9
Test the four-fiber BLSR using procedures in Step 11 in the
page
5-14.
November 2001
Figure 5-12
Span Reversion—Set the amount of time that will pass before the traffic reverts to the original
working path following a span reversion. The default is 5 minutes.
West Protect—Assign the east BLSR port that will connect to the east protect fiber from the
pull-down menu. (In
Figure
East Protect—Assign the east BLSR port that will connect to the east protect fiber from the
pull-down menu. (In
Figure
shows an example.
5-12, this is Slot 6.)
5-12, this is Slot 13.)
"Provision the BLSR" procedure on
Cisco ONS 15454 Installation and Operations Guide
Bidirectional Line Switched Rings
5-17
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