In-Service Topology Upgrades - Cisco ONS 15600 Reference Manual

Chapter 8 SONET Topologies and Upgrades
Figure 8-12
ONS 15454
Node 5
ONS 15454
Node 6

8.5 In-Service Topology Upgrades

Topology upgrades can be performed in-service to convert a live network to a different topology. An
in-service topology upgrade is potentially service-affecting, and generally allows a traffic hit of 50 ms
or less. Traffic might not be protected during the upgrade. The following in-service topology upgrades
are supported:
•
•
•
You can perform in-service topology upgrades irrespective of the service state of the involved
cross-connects or circuits, however all circuits must have a DISCOVERED status.
ONS 15600 circuit types supported for in-service topology upgrades are:
•
•
•
•
•
•
You cannot upgrade stitched Ethernet circuits during topology conversions. For in-service topology
upgrade procedures, refer to the "Convert Network Configurations" chapter in the Cisco ONS 15600
Procedure Guide. For procedures to add or remove a node, refer to the "Add and Remove Nodes" chapter
of the Cisco ONS 15600 Procedure Guide.
PPMN Virtual Ring
ONS 15454
Node 1
OC-12
ONS 15454
Node 2
Point-to-point or linear ADM to two-fiber BLSR
Two-fiber BLSR to four-fiber BLSR
Node addition or removal from an existing topology
Synchronous transport signal (STS)
Unidirectional and bidirectional
Automatically routed and manually routed
CTC-created and TL1-created
Ethernet (unstitched)
Multiple source and destination (both sources should be on one node and both drops on one node)
ONS 15454
Node 4
OC-48
ONS 15454
Node 3
Cisco ONS 15600 Reference Manual, R6.0
8.5 In-Service Topology Upgrades
ONS 15454
Node 8
OC-12
ONS 15454
Node 7
8-13