A-8
Cisco ONS 15454 SDH Installation and Operations Guide, R3.3
May 2002
Appendix A Circuit Routing
Constraint-Based Circuit Routing
The required nodes and links constraint is only used during the primary path computation and only for
extended SNCP mesh network domains/segments. The alternate path is computed normally; CTC uses
excluded nodes/links when finding all primary and alternate paths on extended SNCP mesh networks.
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