Circuit Attributes: VC Low-Order Path VCAT Circuit
(ONS 15454 SDH only) Use the Circuit Attributes page to provision basic circuit parameters. The following table describes the Circuit Attributes page fields and buttons that appear for low-order path VCAT circuits.
 
Item
Description
Name
Displays the circuit name. The name can be alphanumeric and up to 48 characters (including spaces). Circuit names should be 44 characters or less if you want to preserve the ability to create monitor circuits. If you leave the field blank, CTC assigns a default name to the circuit.
Type
(Display only) VC_LO_PATH_VCAT_CIRCUIT.
Bidirectional
(Display only) Checked is the default for low-order path VCAT circuits.
Create cross-connects only (TL1-like)
Creates one or more cross-connects to complete a signal path for TL1-generated circuits. Nodes that do not support TL1 cross-connect naming will ignore the circuit name.
State
Lists the administrative states. An administrative state puts the circuit cross-connects into the related service state if network conditions allow:
 •
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.
 •
locked,maintenance: Puts the circuit cross-connects in the locked-enabled,maintenance service state. The locked-enabled,maintenance service state does not interrupt traffic flow; it suppresses alarms and conditions and allows loopbacks to be performed on the circuit. Use the locked,maintenance administrative state for circuit testing or to suppress circuit alarms temporarily. Change the administrative state to unlocked; unlocked,automaticInService; or locked,disabled when testing is complete.
 •
unlocked,automaticInService: Puts the circuit cross-connects in the unlocked-disabled,automaticInService service state. Alarms and conditions are suppressed. When the connections receive a valid signal, the service state automatically changes to unlocked-enabled.
 •
locked,outOfGroup: (VCAT circuits only) Puts the circuit cross-connects in the locked-enabled,maintenance & outOfGroup service state. The locked,outOfGroup administrative state is used to place a VCAT member circuit out of the group and to stop sending traffic. locked,outOfGroup only applies to the cross-connect on the end node where the VCAT resides.
For additional state information, see States.
Apply to drop ports
Applies the state chosen in the State field to the circuit source and destination ports. CTC applies the circuit state to the ports only in the following cases:
 •
The circuit bandwidth is the same as the port bandwidth.
 •
The port bandwidth is larger than the circuit and the circuit is the first circuit to use the drop port.
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.
Symmetric
(Display only) Provisions the same number of members in both directions. Members use the same set of time slots but in opposite directions.
Open VCAT
If checked, creates an open-ended VCAT circuit.
Member size
Sets the member size: VC3 or VC12.
Num. of Members
Sets the number of members Valid entries are 1 through 256.
Mode
Sets the VCAT circuit mode. Valid entries are:
 •
None: No mode is provisioned.
 •
Sw-LCAS: Allows temporary removal of an existing member when a member fails. The failed member is removed for the duration of the failure. Sw-LCAS applies to the ML-Series cards, which do not support the full LCAS functionality.
 •
LCAS: Allows the members in a VCAT group to be changed without interrupting the operation of noninvolved members (errorless).
Provision working go & return on primary path
If checked, the shortest path is the working path for both traffic directions. If unchecked, only one direction makes the shortest path the working path.
Revertive
If checked, traffic reverts to the working path when the conditions that diverted it to the protect path are repaired. If unchecked, traffic remains on the protect path after the switch.
Reversion time
Available when Revertive is checked. Sets the amount of time that will elapse before traffic reverts to the working path. Traffic can revert when conditions causing the switch are cleared. The range is 0.5 to 12.0 minutes. The default is 5.0 minutes.
SF threshold
(Display only) Unavailable for low-order circuits.
SD threshold
(Display only) Unavailable for low-order circuits.
Switch on PDI-P
(Display only) Unavailable for low-order circuits.
Back
Displays the Circuit Creation page.
Next
Displays the Circuit Source page.
Cancel
Cancels circuit creation.
Help
Displays context-sensitive help.

Copyright © 2002-2011, Cisco Systems, Inc. All rights reserved.