Cisco ONS 15454 Series, Руководство по процедурам

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6-7
Cisco ONS 15454 Procedure Guide, R5.0
August 2005
Chapter 6 Create Circuits and VT Tunnels
NTP-A181 Create an Automatically Routed DS-1 Circuit
•
Circuit Type—Choose VT . VT cross-connects will carry the DS-1 circuit across the ONS 15454
network.
• Number of Circuits—Enter the number of DS-1 circuits you want to create. The default is 1. If you
are creating multiple circuits with the same slot and sequential port numbers, you can use
Auto-ranged to create the circuits automatically.
•
Auto-ranged—This check box is automatically selected if you enter more than 1 in the Number of
Circuits field. Auto-ranging creates identical (same source and destination) sequential circuits
automatically. Uncheck the box if you do not want CTC to create sequential circuits automatically.
Step 6 Click Next .
Step 7
Define the circuit attributes ( Figure 6-1 ):
• Name—Assign a name to the circuit. 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 circuit.
•
Size—VT1.5 is the default. You cannot change it.
• Bidirectional—Leave checked for this circuit (default).
•
Create cross-connects only (TL1-like)—Check this box if you want to create one or more
cross-connects to complete a signal path for TL1-generated circuits. Also, VT tunnels and
Ethergroup sources and destinations are unavailable.
• Diagnostic—Leave unchecked.
•
State—Choose the administrative state to apply to all of the cross-connects in a circuit:
– IS—Puts the circuit cross-connects in the In-Service and Normal (IS-NR) service state.
–
OOS,DSBLD—Puts the circuit cross-connects in the Out-of-Service and
Management, Disabled (OOS-MA,DSBLD) service state. Traffic is not passed on the circuit.
– IS,AINS—Puts the circuit cross-connects in the Out-of-Service and Autonomous, Automatic
In-Service (OOS-AU,AINS) service state and suppresses alarms and conditions. When the
connections receive a valid signal, the service state automatically changes to IS-NR.
–
OOS,MT—Puts the circuit cross-connects in the Out-of-Service and
Management, Maintenance (OOS-MA,MT) 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 OOS,MT for circuit testing or to suppress circuit alarms temporarily. Change
the administrative state to IS; IS,AINS; or OOS,DSBLD when testing is complete. See the
“DLP-A230 Change a Circuit Service State” task on page 19-19 .
For additional information about circuit service states, refer to the “Circuits and Tunnels” chapter
in the
Cisco ONS 15454 Reference Manual .
•
Apply to drop ports—Check this check box if you want to apply the administrative state chosen in
the State field to the circuit source and destination ports. CTC applies the administrative 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 port. If not, a Warning dialog
box displays the ports where the administrative state could not be applied. If the check box is
unchecked, CTC does not apply the administrative state of the source and destination ports.
Note
Loss of signal alarms are generated if ports in the IS-NR service state are not receiving
signals.