Cisco ONS 15327, User Documentation

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6-4
Cisco ONS 15327 User Documentation, R3.3
June 2002
Chapter 6 Circuits and Tunnels
Creating Circuits and VT Tunnels
Options include node, slot, port, STS, and VT/DS-1. The options that display depend on the circuit type
and circuit properties you selected in Step 3 and the cards installed in the node. For Ethergroups, see the
“Ethernet Circuit Configurations” section on page 9-6 .
Click Use Secondary Source if you need to create a UPSR bridge/selector circuit entry point in a
multivendor UPSR.
Step 7
Click Next .
Step 8
In the Circuit Destination dialog box, enter the appropriate information for the circuit destination. If the
circuit is bidirectional, you can click
Use Secondary Destination if you need to create a UPSR
bridge/selector circuit destination point in a multivendor UPSR. (To add secondary destinations to
unidirectional circuits, see
“Create a Unidirectional Circuit with Multiple Drops” procedure on
page 6-8 .)
Step 9
Click Next .
Step 10 Under Circuit Routing Preferences ( Figure 6-2 ), select Route Automatically . The following options
(described in detail in the next step) are available:
•
Using Required Nodes/Spans —If selected, you can specify nodes and spans to include or exclude in
the CTC-generated circuit route.
• Review Route Before Creation —If selected, you can review and edit the circuit route before the
circuit is created.
Step 11
If you want the circuit routed on a protected path, select Fully Protected Path . Otherwise, go to
Step 12. CTC creates a primary and alternate circuit route (virtual UPSR) based on the path diversity
option you select:
•
Nodal Diversity Required —Ensures that the primary and alternate paths within path-protected mesh
network (PPMN) portions of the complete circuit path are nodally diverse. (For information about
PPMN, see the
“Path-Protected Mesh Networks” section on page 5-42 .)
•
Nodal Diversity Desired —Specifies that node diversity should be attempted, but if node diversity is
not possible, CTC creates link diverse paths for the PPMN portion of the complete circuit path.
• Link Diversity Only —Specifies that only link-diverse primary and alternate paths for PPMN
portions of the complete circuit path are needed. The paths may be node-diverse, but CTC does not
check for node diversity.
Figure 6-2 Setting circuit routing preferences