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Cisco ONS 15454 SDH Procedure Guide, R7.0
78-17194-01
Chapter 6 Create Circuits and Low-Order Tunnels
NTP- D187 Create a Low-Order Aggregation Point
–
Unlocked,automaticInService—Puts the circuit cross-connects in the
Unlocked-disabled,automaticInService service state and suppresses alarms and conditions.
When the connections receive a valid signal, the service state automatically changes to
Unlocked-enabled.
–
Locked,maintenance—Puts the circuit cross-connects in the Locked-enabled,maintenance
service state. The maintenance state does not interrupt traffic flow; it suppresses alarms and
conditions and allows loopbacks to be performed on the circuit. Use Locked,maintenance for
circuit testing or to suppress circuit alarms temporarily. Change the administrative state to
Unlocked; Unlocked,automaticInService; or Locked,disabled when testing is complete. See the
“DLP-D230 Change a Circuit State” task on page 19-26.
Note A low-order aggregation point automatically transitions into the Unlocked service state after
a VC12 or VC3 circuit is created.
For additional information about circuit service states, refer to the “Circuits and Tunnels” chapter
in the Cisco ONS 15454 SDH Reference Manual.
• Apply to drop ports—Uncheck this box.
Figure 6-8 Setting Attributes for a Low-Order Aggregation Point
Note LAPs cannot be routed on an SNCP ring, so the SNCP path selectors do not apply.
Step 8 Click Next.
Step 9 In the Circuit Source area, choose the source node, slot, port, and VC4 for the LAP. The LAP source is
where the low-order circuits are aggregated into a single VC4. The LAP destination is where the
low-order circuits originate.
a. From the Node drop-down list, choose the node where the LAP will originate.
b. From the Slot drop-down list, choose the slot containing the STM-N, E3-12, DS3i-N-12, or
STM1E-12 card where the LAP will originate.
c. Depending on the card chosen in Step b, choose the port and/or VC4 from the Port and VC4
drop-down lists.
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