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Cisco ONS 15454 SDH Procedure Guide, R7.0
78-17194-01
Chapter 6 Create Circuits and Low-Order Tunnels
NTP- D323 Create an Automatically Routed High-Order Circuit
• 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 16 If you selected Fully Protected Path in Step 14 and the circuit will be routed on an MS-SPRing DRI or
SNCP DRI, check the Dual Ring Interconnect check box. If not, continue with Step 19.
Step 17 If you checked Dual Ring Interconnect for an SNCP in Step 16, complete the following substeps. If you
checked Dual Ring Interconnect for a MS-SPRing, skip this step and 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.
c. Click Include to include the node or span in the circuit, or click Exclude to exclude the node or span
from the circuit. The order in which you choose included nodes and spans is the order in which the
circuit is routed. Click spans twice to change the circuit direction.
d. Repeat Step c for each node or span that you wish to include or exclude.
e. Review the circuit route. To change the circuit routing order, choose a node from the Required
Nodes/Lines or Excluded Nodes Links lists, then click the Up or Down buttons to change the circuit
routing order. Click Remove to remove a node or span.
Step 18 If you checked Dual Ring Interconnect for a MS-SPRing in Step 16, complete the following substeps to
assign primary and secondary nodes and ring type.
a. In the Circuit Constraints for Automatic Routing area, click Add MS-SPRing DRI.
b. In the confirmation window, click OK.
c. In the Node Options area of the MS-SPRing DRI Options dialog box, complete the following:
• Primary Node—For a traditional or integrated MS-SPRing DRI, choose the node where the
circuit interconnects the rings.
• Secondary Node—For a traditional or integrated MS-SPRing DRI, choose the secondary node
for the circuit to interconnect the rings. This route is used if the route on the primary node fails.
• Primary Node #2—For a traditional MS-SPRing DRI where two primary nodes are required to
interconnect rings, choose the second primary node.
• Secondary Node #2—For a traditional MS-SPRing DRI where two secondary nodes are
required, choose the second secondary node.
d. In the Ring and Path Options area, complete the following:
• The first ring is—Choose SNCP or MS-SPRing from the drop-down list.
• The second ring is—Choose SNCP or MS-SPRing from the drop-down list.
• Use ring interworking protection (RIP) on secondary path—Check this box to carry the
secondary spans on the protection channels. These spans will be preempted during a ring/span
switch.
e. Click OK. The node information appears in the Required Nodes/Lines list, and the map graphic
indicates which nodes are primary and secondary.
f. In the Circuit Constraints for Automatic Routing area, click a node or span on the circuit map.
g. Click Include to include the node or span in the circuit, or click Exclude to exclude the node or span
from the circuit. The order in which you choose included nodes and spans is the order in which the
circuit will be routed. Click spans twice to change the circuit direction. If you are creating an SNCP
to MS-SPRing traditional handoff, exclude the unprotected links from the primary node towards the
secondary node. If you are creating an SNCP to MS-SPRing integrated handoff, exclude
unnecessary DRIs on the SNCP segments.
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