Procedure 12-23: Back out OC-12 1+1 to OC-48 1+1 upgrade (single-rate circuit packs)
Overview
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NOTICE Service-disruption hazard |
If a node has been taken out of the Ring Upgrade Mode, the node cannot be returned to the original pre-upgrade state without affecting service.
All nodes connected to the 1+1 network using the Main slots must be in the provisioned Ring Upgrade Mode.
Use this procedure to back out an OC-12 1+1 to OC-48 1+1 upgrade.
Backing out of an upgrade in progress returns all nodes in the 1+1 network to their pre-upgrade state.
To temporarily stop the upgrade refer to Procedure 12-24: Suspend OC-12 1+1 to OC-48 1+1 upgrade (single-rate circuit packs).
Privilege level
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NOTICE Equipment damage |
Rocking circuit packs back and forth when removing or installing them can damage circuit pack and/or shelf connectors.
Do not rock circuit packs back and forth when removing or installing them. Carefully slide circuit packs into or out of the shelf slot.
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NOTICE Service-disruption hazard |
Removing or installing circuit packs during a System Reset can cause system errors.
Do not remove or install a circuit pack during a System Reset. If a System Reset occurs, wait until the System Reset is complete, then remove or install the circuit pack.
Before you begin
Prior to performing this procedure:
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Refer to Laser safety and Electrostatic discharge in Chapter 1, Safety.
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Review the applicable Alcatel-Lucent 1665 Data Multiplexer Extend (DMXtend) Software Release Description for any detailed procedures or cautions that may apply to this backout procedure. If required, refer to the Alcatel-Lucent 1665 Data Multiplexer (DMX) Customer Release Notes.
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If required, review the Alcatel-Lucent 1665 Data Multiplexer (DMX) User Operations Guide, 365-372-301 for procedures or cautions that may apply to this backout procedure.
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Determine the local operating procedures for removing a circuit pack. Local operating procedures for removing a circuit pack may vary. One method is to disconnect the optical fibers and remove the circuit pack. Another method is to verify the circuit pack active/standby status, perform manual switches if the circuit pack is active, and then disconnect the optical fibers and remove the circuit pack.
Steps
Important!
When optical fibers are disconnected during this procedure, inc. LOS alarms are reported. The holdover mode active condition may also be reported depending on the provisioned system timing mode.
Complete the following steps to back out of an OC-12 1+1 to OC-48 1+1 upgrade.
1 |
From office records and work instructions, determine the network configuration and current status of the upgrade. | ||||||||
2 |
Reference: Refer to the 1+1 network configuration examples at the end of the procedure. | ||||||||
3 |
Important! At nodes connected to the 1+1 network using the Main slots, the system reports the ring upgrade mode standing condition (not alarmed) in the NE Alarm List until the node is manually provisioned back to the Normal mode. At nodes connected to the 1+1 network using the Main slots, click the Alarm List button in the top right corner of the System View to view the NE Alarm List and verify that no alarms or standing conditions are present (except ring upgrade mode and ABN condition). Refer to the appropriate trouble-clearing procedures to clear all existing alarms and standing conditions (except ring upgrade mode and ABN condition) before continuing with this procedure. Reference:
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4 |
At each node connected to the 1+1 network using a port pair in the Function/Growth slots, select Configuration → Update System → Update All. Result: A dialog box appears asking you to confirm executing this command. Click Yes. The inc. OC48 LOS alarms for the upgrade OC-48 ports clear. | ||||||||
5 |
At each node connected to the 1+1 network using a port pair in the Function/Growth slots, select Configuration → Cross-Connections and use the Cross-Connection Wizard to delete the remaining add cross-connections to the upgrade OC-48 ports. | ||||||||
6 |
Important! This completes the backout procedure, except for taking the nodes connected to the 1+1 network using the Main slots out of the Ring Upgrade Mode. The decision to take these nodes out of the Ring Upgrade Mode or leave them depends on the reason the back out was necessary, and what is required before again starting the upgrade. In the Ring Upgrade Mode, cross-connections cannot be created or removed. If required at each node connected to the 1+1 network using the Main slots, select Configuration → Normal Mode. Result: A dialog box appears asking you to confirm changing the NE Mode to Normal mode. Click Yes. The ABN LED is turned off on the SYSCTL circuit pack faceplate and the Ring Upgrade Mode will be removed from the WaveStar® CIT alarm list. End of steps |
1+1 network configuration examples
Nodes connected to the 1+1 network using the Main Slots
Figure 12-11: Nodes connected using Main slots
Figure 12-12: Nodes connected using Main slots and Function/Growth slots
Figure 12-13: Nodes connected using Function/Growth slots
