Cisco ONS 15454 SDH - Figure 6-4 Setting Circuit Routing Preferences

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Cisco ONS 15454 SDH Procedure Guide, R7.0
78-17194-01
Chapter 6 Create Circuits and Low-Order Tunnels
NTP- D81 Create an Automatically Routed Low-Order VC12 Circuit
Figure 6-4 Setting Circuit Routing Preferences
Step 13
Set the circuit path protection:
• To route the circuit on a protected path, leave Fully Protected Path checked and continue with
Step 14. CTC creates a fully protected circuit route based on the path diversity option you choose.
Fully protected paths might or might not have SNCP path segments (with primary and alternate
paths), and the path diversity options apply only to SNCP path segments, if any exist.
• To create an unprotected circuit, uncheck Fully Protected Path and continue with Step 16.
• To route the circuit on an MS-SPRing protection channel, if available, uncheck Fully Protected
Path, check Protection Channel Access, click Ye s in the Warning dialog box, and then continue
with Step 16.
Caution Circuits routed on MS-SPRing protection channels are not protected. They are preempted during
MS-SPRing switches.
Step 14 If you selected Fully Protected Path in Step 13 and the circuit will be routed on an SNCP, choose one of
the following:
• Nodal Diversity Required—Ensures that the primary and alternate paths within SNCP ring
portions of the complete circuit path are nodally diverse.
• Nodal Diversity Desired—Specifies that node diversity is preferred, but if node diversity is not
possible, CTC creates fiber-diverse paths for the SNCP ring portion of the complete circuit path.
• Link Diversity Only—Specifies that only fiber-diverse primary and alternate paths for SNCP ring
portions of the complete circuit path are needed. The paths might be node diverse, but CTC does not
check for node diversity.
Step 15 If you selected Fully Protected Path in Step 13 and the circuit will be routed on an SNCP DRI, check the
Dual Ring Interconnect check box.
Step 16 If you selected Using Required Nodes/Spans in Step 12, complete the following substeps. If not,
continue with Step 18.
a. Click Next.
b. In the Circuit Route Constraints For Auto Routing area, click a node or span on the circuit map.