Procedure 12-12: Back out OC-48 BLSR to OC-192 BLSR upgrade
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 in the ring must be in the provisioned Ring Upgrade Mode.
Use this procedure to back out of an OC-48 BLSR to OC-192 BLSR upgrade.
Backing out of an upgrade in progress returns all nodes in the ring to their pre-upgrade state.
To temporarily stop the upgrade refer to Procedure 12-13: Suspend OC-48 BLSR to OC-192 BLSR upgrade.
Important!
Transmission hits will occur during this procedure whenever an OLIU circuit pack with a different line rate is installed or removed from a Main slot. The transmission hit is a result of an internal system timing adjustment to accommodate different line rates in the two Main slots.
Note:
Auto Ring Discovery must be disabled for this procedure.
Privilege level
You must log in as a Privileged user to complete this procedure.
Required equipment
The following equipment is required to perform this procedure:
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Original OC-48 OLIU circuit packs for each node to be backed out
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The temporary replacement OC-48 OLIU circuit pack is required if Main slot M1 of the starting node was originally equipped with an LNW26B, LNW27 (pre Series 1:6), LNW28, LNW29 (pre Series 1:6), LNW76 (pre Series 1:6), LNW77, LNW121B–159B, and LNW221–259 (pre Series 1:6) OC-48 OLIU circuit pack.
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As the upgrade is backed out around the BLSR, ensure that technicians are available at each end of an optical span as the upgrade is backed out.
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NOTICE Equipment damage hazard |
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 information in Chapter 1, Safety.
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Review the applicable Alcatel-Lucent 1665 Data Multiplexer (DMX) Software Release Description for any detailed 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.
- Disable Auto Ring Discovery.
Steps
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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 in the ring must be in the provisioned Ring Upgrade Mode.
Important!
This procedure starts at the last node upgraded.
When optical fibers are disconnected during this procedure, inc. LOS, section DCC channel failed, and neighbor SYSCTL CP unavailable alarms are reported. The holdover mode active condition may also be reported depending on the provisioned system timing mode.
When optical fibers are connected during this procedure, Default K-bytes alarms are reported temporarily.
Complete the following steps to back out an OC-48 to OC-192 BLSR upgrade.
1 |
From office records and work instructions, determine the network configuration and current status of the upgrade. | ||||||||||
2 |
Identify the last node where action was taken.
Reference: Procedure 14-2: Connect Personal Computer (PC) and establish WaveStar® CIT session | ||||||||||
3 |
If required, verify the active/standby status of the OC-192 OLIU circuit pack in Main slot M1 and perform manual switches to switch traffic away from an active circuit pack. Reference: Procedure 12-12.3: Verify active/standby status of circuit pack to be replaced | ||||||||||
4 |
Using office records, determine the original OC-48 OLIU circuit pack types installed in the Main slots. | ||||||||||
5 |
If an OC-192 OLIU circuit pack is connected to an OC-48 OLIU circuit pack equipment damage may occur. Do not reconnect the optical fibers until instructed to do so. The optical fibers are reconnected after the OC-192 OLIU circuit pack is backed out at each end of the optical span. Important! If Main slot M1 of the starting node was originally equipped with an LNW26B, LNW27 (pre Series 1:6), LNW28, LNW29 (pre Series 1:6), LNW76 (pre Series 1:6), LNW77, LNW121B–159B, and LNW221–259 (pre Series 1:6) OC-48 OLIU circuit pack, the temporary replacement OC-48 OLIU circuit pack must be installed in Main slot M1 while backing out of the upgrade. As a final step, the temporary replacement OC-48 OLIU circuit pack is replaced with the original OC-48 OLIU circuit pack. If the circuit pack is active for timing and/or transmission, opening the latch causes timing and/or transmission switches. Transmission hits (less than 60 ms) will occur for each separate protection switch. Open the lower faceplate latch on the OC-192 OLIU circuit pack in Main slot M1. Disconnect the optical fibers from the OC-192 OLIU circuit pack in Main slot M1. Then replace the OC-192 OLIU circuit pack in Main slot M1 with the required original or temporary replacement OC-48 OLIU circuit pack. Result: A transmission hit will occur after the temporary replacement OC-48 OLIU circuit pack is inserted in the slot. The transmission hit is a result of an internal system timing adjustment to accommodate different line rates in the two Main slots. The OC-48 OLIU circuit pack in Main slot M1 is tested and autoprovisioned. The system reports an unexpected circuit pack type condition and an inc. OC192 LOS alarm for Main slot M1. The system also reports a Line Automatic Switch condition for Main slot M1. Alarms may also be reported at other nodes in the ring. If the provisioned system timing mode is External, the system may also report an inc. DS1 sync. ref. OOL alarm. Reference: Procedure 4-2: Install OLIU circuit packs in Main slots This completes the first phase of the back out at the starting node. The back out at the starting node will be completed after backing out of all the other nodes in the ring. The following figure shows the state of the starting node and the adjacent optical spans.  | ||||||||||
6 |
Log in to the adjacent node connected to Main slot M1. (Refer to the Figure 12-1, BLSR backout example at the end of the procedure.) Reference: Procedure 14-2: Connect Personal Computer (PC) and establish WaveStar® CIT session | ||||||||||
7 |
Using office records, determine the original OC-48 OLIU circuit pack types installed in the Main slots. | ||||||||||
8 |
For more information about compatible and incompatible OC-48 OLIU circuit packs. refer to Procedure 12-11: Upgrade OC-48 BLSR to OC-192 BLSR. | ||||||||||
9 |
Except for the starting node, has the upgrade been backed out of all nodes in the BLSR?
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10 |
Log in to the starting node. Refer to the Figure 12-1, BLSR backout example. Note: If Configuration → System → Upgrade not has been performed on the current node, proceed to Step 12. Reference: Procedure 14-2: Connect Personal Computer (PC) and establish WaveStar® CIT session | ||||||||||
11 |
Important! The UPD/INIT button does not work during this upgrade. At the System View select Configuration → Update System → Upgrade. Select main-1 (default) as the Directed Slot Choice and click OK. Result: A dialog box appears asking you to confirm executing this command. Click Yes. The unexpected circuit pack type condition for Main slot M1 clears. The system reports an unexpected circuit pack type condition for Main slot M2. | ||||||||||
12 |
If required, verify the active/standby status of the OC-192 OLIU circuit pack in Main slot M2 and perform manual switches to switch traffic away from an active circuit pack. Reference: Procedure 12-12.3: Verify active/standby status of circuit pack to be replaced | ||||||||||
13 |
Important! If the circuit pack is active for timing and/or transmission, opening the latch causes timing and/or transmission switches. Transmission hits (less than 60 ms) will occur for each separate protection switch. Open the lower faceplate latch on the OC-192 OLIU circuit pack in Main slot M2. Disconnect the optical fibers from the OC-192 OLIU circuit pack in Main slot M2. Then replace the OC-192 OLIU circuit pack in Main slot M2 with the original OC-48 OLIU circuit pack. Result: A transmission hit will occur after the OC-192 OLIU circuit pack is removed. The transmission hit is a result of an internal system timing adjustment to accommodate different line rates in the two Main slots.
Reference: Procedure 4-2: Install OLIU circuit packs in Main slots For more information about compatible and incompatible OC-48 OLIU circuit packs. refer to Procedure 12-11: Upgrade OC-48 BLSR to OC-192 BLSR. | ||||||||||
14 |
At both ends of the optical span to be backed out, perform the following to connect the original OC-48 OLIU circuit pack in Main slot M2 and the required OC-48 circuit pack/port at the opposite end of the original OC-48 optical span:
Result:
Reference: Procedure 14-4: Perform connection and verification of optical facility | ||||||||||
15 |
Important! The UPD/INIT button does not work during this upgrade. At the System View select Configuration → Update System → Upgrade. Select main-2 as the Directed Slot Choice and click OK. Result: A dialog box appears asking you to confirm executing this command. Click Yes. The original OC-48 OLIU circuit pack in Main slot M2 is tested and autoprovisioned. The system performs an automatic line protection switch, and all traffic is now active on Main slot M2. Transmission hits (less than 60 ms) occur as traffic switches from the circuit pack in Main slot M1 to the circuit pack in Main slot M2. The unexpected CP type alarm and Line Automatic Switch condition for Main slot M2 clear. The system reports an unexpected CP type alarm and a Line Automatic Switch condition for Main slot M1. | ||||||||||
16 |
Important! This step is required only if Main slot M1 is equipped with the temporary replacement OC-48 OLIU circuit pack. If require, open a faceplate latch on the temporary replacement OC-48 OLIU circuit pack in Main slot M1. Disconnect the optical fibers from the temporary replacement OC-48 OLIU circuit pack in Main slot M1. Then replace the temporary replacement OC-48 OLIU circuit pack in Main slot M1 with the original OC-48 OLIU circuit pack. Result: The original OC-48 OLIU circuit pack in Main slot M1 is tested and autoprovisioned. The unexpected CP type alarm for Main slot M1 clears, and the system reports an inc. OC48 LOS alarm for Main slot M1. Reference: Procedure 4-2: Install OLIU circuit packs in Main slots | ||||||||||
17 |
Measure the optical receive power of the receive fiber using an optical power meter. Select the appropriate LBO to attenuate the receive signal to the middle of the allowable optical receive power range. (Refer to the Alcatel-Lucent 1665 Data Multiplexer (DMX) Applications and Planning Guide, 365-372-300 for the SONET optical specifications of the OC-48 OLIU circuit packs.) | ||||||||||
18 |
Clean all fiber connectors, and connect the transmit and receive optical fibers to the original OC-48 OLIU circuit pack in Main slot M1. Result: The inc. OC48 LOS alarms clear. Transmission is now supported on the original OC-48 optical span. Reference: Procedure 14-3: Clean optical fibers, dual LC adapters and LC lightguide buildouts (LBOs) | ||||||||||
19 |
Important! At each node in the BLSR, 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 each node in the BLSR, 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: Alcatel-Lucent 1665 Data Multiplexer (DMX) Alarm Messages and Trouble Clearing Guide, 365-372-302 | ||||||||||
20 |
Important! This completes the backout procedure, except for taking the nodes out of the Ring Upgrade Mode and enabling Automatic Ring Discovery. The decision to take all nodes out of the Ring Upgrade Mode depends on the reason the back out was necessary, and what is required before again starting or completing the ring upgrade. All nodes must remain in the Ring Upgrade node until the ring upgrade is completed. At each node in the BLSR as required, select Configuration → Normal Mode to take the node out of the Ring Upgrade 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. | ||||||||||
21 |
At each node in the BLSR as required, select View → Protection to access the 2F BLSR main-1-1 protection group and click Select. Click on the Provisionable Parameters tab and observe the Automatic Ring Discovery parameter. If required, select Configuration → Equipment to access the 2F BLSR main-1-1 protection group and Enable Automatic Ring Discovery. End of steps |
BLSR example
Figure 12-1: BLSR backout example
