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19-18
Cisco ONS 15454 SDH Procedure Guide, R7.2
October 2007
Chapter 19 DLPs D200 to D299
DLP- D218 Provision SNCP Ring Selectors During Circuit Creation
DLP-D218 Provision SNCP Ring Selectors During Circuit Creation
Note Provisioning SD-P or SF-P thresholds on the Circuit Attributes page of the Circuit Creation wizard sets
the values only for SNCP-protected spans. The circuit source and destination use the node default values
of 10E-4 for SD-P and 10E-6 for SF-P for unprotected circuits and for the source and drop of SNCP
circuits.
Step 1 In the SNCP area of the Circuit Attributes page, set the SNCP path selectors:
• Provision working go & return on primary path—Check this box to route the working path on one
fiber pair and the protect path on a separate fiber pair. This feature only applies to bidirectional
SNCP circuits.
• Revertive—Check this box if you want traffic to revert to the working path when the conditions that
diverted it to the protect path are repaired. If you do not choose Revertive, traffic remains on the
protect path after the switch.
• Reversion time—If Revertive is checked, click the Reversion time field and choose a reversion time
from the drop-down list. The range is 0.5 to 12.0 minutes. The default is 5.0 minutes. This is the
amount of time that will elapse before the traffic reverts to the working path. Traffic can revert when
conditions causing the switch are cleared.
• SF threshold—For high-order circuits, set the SNCP path-level signal failure (SF) bit error rate
(BER) thresholds. Unavailable for low-order circuits.
• SD threshold—For high-order circuits, set the SNCP path-level signal degrade (SD) BER
thresholds. Unavailable for low-order circuits.
• Switch on PDI-P—For high-order circuits, check this box if you want traffic to switch when an
high-order payload defect indicator (PDI) is received. Unavailable for low-order circuits.
Step 2 Return to your originating procedure (NTP).
Purpose This task provisions subnetwork connection protection (SNCP) ring
selectors during circuit creation. Use this task only if the circuit will be
routed on an SNCP ring.
Tools/Equipment None
Prerequisite Procedures DLP-D60 Log into CTC, page 17-49
You must have the Circuit Attributes page of the Circuit Creation wizard
open.
Required/As Needed As needed
Onsite/Remote Onsite or remote
Security Level Provisioning or higher