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Cisco ONS 15600 SDH Reference Manual, Release 9.0
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Chapter 8 SDH Topologies and Upgrades
8.8.1 Point-to-Point or Linear ADM to Two-Fiber MS-SPRing
Note
Open-ended SNCP and DRI configurations do not support in-service topology upgrades.
8.8.1 Point-to-Point or Linear ADM to Two-Fiber MS-SPRing
A 1+1 point-to-point or linear ADM to two-fiber MS-SPRing conversion is manual. You must remove
the protect fibers from all nodes in the linear ADM and route them from the end node to the protect port
on the other end node. In addition, you must delete the circuit paths that are located in the bandwidth
that will become the protection portion of the two-fiber MS-SPRing (for example, circuits in VC4s 9 and
higher on an STM-16 MS-SPRing) and recreate them in the appropriate bandwidth. Finally, you must
provision the nodes as MS-SPRing nodes. For in-service topology upgrade procedures, refer to the
“Convert Network Configurations” chapter in the
Cisco ONS 15600 SDH Procedure Guide
.
8.8.2 Add or Remove a Node from a Topology
You can add or remove a node from a linear ADM, MS-SPRing, or SNCP configuration. Adding or
removing nodes from MS-SPRings is potentially service affecting, however adding and removing nodes
from an existing 1+1 linear ADM or SNCP configuration does not disrupt traffic. CTC provides a wizard
for adding a node to a point-to-point or 1+1 linear ADM. This wizard is used when adding a node
between two other nodes. For procedures to add or remove a node, refer to the “Add and Remove Nodes”
chapter in the
Cisco ONS 15600 SDH Procedure Guide
.
