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Cisco ONS 15454 SDH Procedure Guide, R7.0
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Chapter 6 Create Circuits and Low-Order Tunnels
NTP- D216 Create a Low-Order Path Tunnel for Port Grouping
• 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.
Note A low-order tunnel 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.
Step 8 If the tunnel 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 9.
Step 9 Click Next.
Step 10 In the Circuit Source area, choose the node where the low-order tunnel will originate from the Node
drop-down list. Complete the following:
a. From the Slot drop-down list, choose the slot containing the card where the circuit will originate.
b. For optical circuits, choose the VC4 from the VC4 drop-down list.
c. For electrical circuits on E3 or DS3i-N-12 cards, choose the port group from the Port Group
drop-down list.
d. Click Next.
Step 11 In the Circuit Destination area, choose the node where the low-order tunnel will terminate from the Node
drop-down list. Complete the following:
a. From the Slot drop-down list, choose the slot containing the card where the circuit will terminate.
b. For optical circuits, choose the VC4 from the VC4 drop-down list.
c. For electrical circuits on E3 or DS3i-N-12 cards, choose the port group from the Port Group
drop-down list.
d. Click Next.
Step 12 In the Circuit Routing Preferences area, choose Route Automatically. Two options are available; choose
either, both, or none based on your preferences.
• Using Required Nodes/Spans—Check this check box to specify nodes and spans to include or
exclude in the CTC-generated tunnel route.
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