5-12
Cisco ONS 15327 User Documentation, R3.3
June 2002
Chapter 5 SONET Topologies
Bidirectional Line Switched Rings
Figure 5-11 A three-node BLSR before adding a new node
Procedure: Add a BLSR Node
Perform these steps on-site and not from a remote location.
Step 1
Draw a diagram, similar to
, for the BLSR installation where you will add the node. In the
diagram, identify the nodes, cards (slots) and spans (east or west) that will connect to the new node. This
information is essential to complete this procedure without error. For example, in
, you
would circle Slot 1 (west) on Node 1, and Slot 2 (east) on Node 4.
Step 2
Log into CTC and display the BLSR nodes in network view. Verify the following:
•
All BLSR spans on the network map are green.
•
On the
Alarms
tab, no critical or major alarms are present, nor any facility alarms, such as LOS,
LOF, AIS-L, SF, and SD. In a BLSR, these facility conditions may be reported as minor alarms.
•
On the
Conditions
tab, no ring switches are active.
If trouble is indicated, for example, a major alarm exists, resolve the problem before proceeding.
Step 3
Install the OC-N cards in the ONS 15327 that you will add to the BLSR; use the
. Ensure fiber cables are available to connect to the cards. Run test traffic
through the node to ensure the cards are functioning properly.
Step 4
Log into the new node and complete the BLSR setup.
•
Provision the SONET DCC using the
“Create the BLSR DCC Terminations” procedure on page 5-8
•
Configure the BLSR timing using the
“Set Up ONS 15327 Timing” procedure on page 3-13
•
Enable the BLSR ports using the
“Enable the BLSR Ports” procedure on page 5-8
•
If the BLSR will connect to third party equipment that cannot transport the K3 byte, the third party
equipment must connect to a Cisco ONS 15454 node. (The BLSR must be a mixed ring of ONS
15327s and ONS 15454s to remap the K3 byte. If connecting rings to third party equipment, refer
the
Cisco ONS 15454 Procedure Guide
.)
•
Provision the BLSR using the
“Provision the BLSR” procedure on page 5-9
Node 1
West
East
West
East
West
East
West
East
Node 3
Node 2
Node 4
Slot 1
Tx Rx
Slot 2
Tx Rx
Slot 1
Tx Rx
Slot 2
Tx Rx
Slot 1
Tx Rx
Slot 2
Tx Rx
Slot 1
Tx Rx
Slot 2
Tx Rx
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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 ...