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Chapter 6 Create Circuits and Low-Order Tunnels
NTP- D134 Create a Manually Routed Low-Order Tunnel
•
Name—Assign a name to the low-order tunnel. The name can be alphanumeric and up to
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.
•
Bidirectional—Unavailable for low-order tunnels.
•
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—Unavailable for low-order tunnels.
Step 8
Click
Next
.
Step 9
In the Circuit Source area, choose the node where the low-order tunnel will originate from the Node
drop-down list.
Step 10
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.
Step 12
Click
Next
.
Step 13
In the Circuit Routing Preferences area, uncheck
Route Automatically
. When Route Automatically is
not selected, the Using Required Nodes/Spans and Review Route Before Circuit Creation check boxes
are unavailable.
Step 14
Click
Next
. In the Route Review and Edit area, node icons appear for tunnel routing. The circuit source
node is selected. Green arrows pointing from the source node to other network nodes indicate spans that
are available for routing the tunnel.
Step 15
Complete the
“DLP-D219 Provision a Low-Order Tunnel Route” task on page 19-18
for the tunnel you
are creating. The Circuits window appears.
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Страница 414: ...16 4 Cisco ONS 15454 SDH Procedure Guide R7 0 78 17194 01 Chapter 16 Power Down the Node NTP D114 Power Down the Node ...
Страница 832: ...A 14 Cisco ONS 15454 SDH Procedure Guide R7 0 78 17194 01 Appendix A CTC Information and Shortcuts Equipment Inventory ...
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