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Cisco ONS 15454 SDH Procedure Guide, R7.0
78-17194-01
Chapter 6 Create Circuits and Low-Order Tunnels
NTP- D55 Create a Manually Routed Low-Order VC3 Circuit
• State—Choose the administrative state to apply to all of the cross-connects in a circuit:
–
Unlocked—Puts the circuit cross-connects in the Unlocked-enabled service state.
–
Locked,disabled—Puts the circuit cross-connects in the Locked-enabled,disabled service state.
Traffic is not passed on the circuit.
–
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.
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—Select this check box if you want to apply the state chosen in the State field
to the circuit source and destination ports. CTC applies the circuit state to the ports only if the circuit
bandwidth is the same as the port bandwidth or, if the port bandwidth is larger than the circuit, the
circuit must be the first circuit to use the drop port. If not, a Warning dialog box shows the ports
where the circuit state could not be applied. If the box is unchecked, CTC does not change the state
of the source and destination ports.
Note If ports managed into the Unlocked administrative state are not receiving signals, loss of
signal alarms are generated and the port service state transitions to
Unlocked-disabled,failed.
• Protected Drops—Select this check box if you want the circuit routed on protected drops only, that
is, to ONS 15454 SDH cards that are in 1:1, 1:N, or 1+1 protection. If you select this check box,
CTC displays only protected cards and ports as source and destination choices.
Step 9 If the circuit will be routed on an SNCP ring, complete the “DLP-D218 Provision SNCP Ring Selectors
During Circuit Creation” task on page 19-17. Otherwise, continue with Step 10.
Step 10 Click Next.
Step 11 Complete the “DLP-D318 Provision a Low-Order VC3 Circuit Source and Destination” task on
page 20-9.
Step 12 In the Circuit Routing Preferences area (Figure 6-2 on page 6-10), uncheck Route Automatically.
Step 13 Set the circuit path protection:
• To route the circuit on a protected path, leave Fully Protected Path checked and continue with
Step 14. Fully protected paths might or might not have SNCP path segments (with primary and
alternate paths), and the path diversity options apply only to SNCP path segments, if any exist.
• To create an unprotected circuit, uncheck Fully Protected Path and continue with Step 17.
• To route the circuit on an MS-SPRing protection channel, if available, uncheck Fully Protected
Path, check Protection Channel Access, click Ye s in the Warning dialog box, then continue with
Step 17.
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