5-28
Cisco ONS 15327 User Documentation, R3.3
June 2002
Chapter 5 SONET Topologies
Unidirectional Path Switched Rings
b.
Remove the west fiber connection from the node that will connect to the east port of the new node.
Step 6
Replace the removed fiber connections with connections from the new node.
Note
Perform this step on site at the new node.
Step 7
Log out of CTC and then log back in.
Step 8
Display the network view. The new node should appear in the network map. Wait for a few minutes to
allow all the nodes to appear.
Step 9
Click the
Circuits
tab and wait for all the circuits to appear, including spans. The affected circuit will
display as “incomplete.”
Step 10
In the network view, right-click the new node and select
Update Circuits With New Node
from the list
of options. Wait for the confirmation dialog box to appear. Verify that the number of updated circuits
displayed in the dialog box is correct.
Step 11
Select the
Circuits
tab and verify that no incomplete circuits are displayed. If incomplete circuits are
displayed, repeat Step 9.
Step 12
Use the
“Switch UPSR Traffic” procedure on page 5-25
to clear the protection switch.
Procedure: Remove a UPSR Node
Caution
The following procedure is designed to minimize traffic outages while nodes are removed, but traffic
will be lost when you delete and recreate circuits that passed through the removed node.
Step 1
Log into a node on the same network as the node you will remove. (Do not log into the node that you
will remove.)
Step 2
From the View menu choose
Go to Network View
to display the UPSR. Verify the following:
•
All UPSR spans on the network map are green.
•
No critical or major alarms (LOF, LOS, ASP, ASL) are displayed on the
Alarms
tab.
•
On the
Conditions
tab, no UPSR switches are active.
•
At each UPSR node, all fibers are securely connected to the appropriate ports.
If trouble is indicated, for example, a critical or major alarm exists, resolve the problem before
proceeding.
Step 3
Delete and recreate the following types of circuits:
a.
Identify unprotected circuits that pass through the node you are removing and delete and recreate
each circuit one at a time so that they no longer pass through that node.
b.
Identify the UPSR circuits that pass through the node you are removing but do not ingress and egress
on the same STSs and delete and recreate each circuit one at a time so that they ingress and egress
on the same STS.
c.
If a circuit has multiple drops, delete only the drops that terminate on the node you are deleting.
If UPSR circuits ingress and egress on the same STS, the circuit will repair itself when the protection
switch clears.
Summary of Contents for ONS 15327
Page 22: ...Contents xxii Cisco ONS 15327 User Documentation June 2002 I N D E X ...
Page 30: ...Figures xxviii Cisco ONS 15327 User Documentation June 2002 ...
Page 44: ...Procedures xlii Cisco ONS 15454 Installation and Operations Guide R3 2 June 2002 ...
Page 540: ...Glossary GL 16 Cisco ONS 15327 User Documentation R3 3 June 2002 ...
