5-15
Cisco ONS 15327 User Documentation, R3.3
June 2002
Chapter 5 SONET Topologies
Bidirectional Line Switched Rings
Procedure: Remove a BLSR Node
Caution
The following procedure minimizes traffic outages during node deletions. You may need to delete
and create circuits that pass through the node to be deleted if the circuit enters and exits the node on
different STSs. This occurrence is rare, and only applies to circuits created with R2.x software.
Traffic will be lost when you delete and recreate circuits that passed through the deleted node.
Step 1
Before you start this procedure, make sure you know the following:
•
Which node is connected through its east port to the node that will be deleted. For example if you
are deleting Node 1 in
, Node 3 is the node connected through its east port to Node 1.
•
Which node is connected through its west port to the node that will be deleted. In
, Node
2 is connected to Node 1 through its west port.
Step 2
Log into a node on the same BLSR as the node you will remove. (Do not log into the node that you will
remove.)
Step 3
Display the BLSR nodes in network view and verify the following:
•
All BLSR 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 ring switches are active.
If trouble is indicated, for example, a critical or major alarm exists, resolve the problem before
proceeding.
Step 4
Display the node that you will remove in node view.
Step 5
Delete all the circuits that originate or terminate in that node. (If a circuit has multiple drops, delete only
the drops that terminate on the node you want to delete.)
a.
Click the
Circuits
tab. The circuits that use this node are displayed.
b.
Select circuits that originate or terminate on the node. Click
Delete
.
c.
Click
Yes
when prompted.
d.
If a multidrop circuit has drops at the node that will be removed, select the circuit, click
Edit
, and
remove the drops.
Step 6
Complete this step if circuits that were created using Cisco Transport Controller Release 2.x pass
through the node that will be deleted:
a.
On the Circuits tab of the node that will be deleted, select a circuit and click
Edit
.
b.
On the Edit Circuits window, check
Show Detailed Map
.
c.
Verify that the circuits enter and exit the node on the same STS. For example, if a circuit enters on
s1/p1/S1 (Slot 1, Port 1, STS1), verify that it exits on STS1. If a circuit enters/exits on different
STSs, write down the name of the circuit. You will delete and recreate these circuits in Step e.
d.
From the View menu, select
Go to Network View
and then select the
Circuits
tab.
e.
Delete, then recreate each circuit recorded in Step c that entered/exited the node to be deleted on
different STSs. To delete the circuit, select the circuit on the Circuits window, then click the
Delete
button. To create the circuit, go to the
“Create an Automatically Routed Circuit” procedure on
.
f.
Repeat Steps a – e for each circuit displayed on the Circuits tab.
Summary of Contents for ONS 15327
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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 ...
