Cisco ONS 15454 SDH Procedure Manual page 217

Chapter 6 Create Circuits and Low-Order Tunnels
For VC3 Port Grouping Only—Leave this box unchecked.
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Click Next.
Step 6
Define the circuit attributes
Step 7
Name—Assign a name to the low-order tunnel. The name can be alphanumeric and up to
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48 characters (including spaces). Circuit names should be 44 characters or less if you want the
ability to create monitor circuits. If you leave the field blank, CTC assigns a default name to the
tunnel.
Size—The default size is VC4. You cannot change this value.
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• Bidirectional—The default is Bidirectional. You cannot change this value.
• State—Choose the administrative state to apply to all of the cross-connects in a circuit:
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–
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Note
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—Unavailable for low-order tunnels.
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78-17194-01
(Figure 6-7 on page
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
A low-order tunnel automatically transitions into the Unlocked service state after a VC12 or
VC3 circuit is created.
NTP- D133 Create an Automatically Routed Low-Order Tunnel
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Cisco ONS 15454 SDH Procedure Guide, R7.0
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