Cisco ONS 15327 User Documentation, Release 1.0.1
Chapter 9, Maintenance
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Table Of Contents

Maintenance

9.1 Air Filter Inspection

9.2 System Reset

9.3 Database Backup and Restore

9.4 True Revert to Earlier Software

9.5 Loopbacks

9.6 Creating Diagnostic Files

9.7 Optic Fiber Cleaning


9

Maintenance

This chapter describes procedures that can be necessary to maintain the Cisco ONS 15327, including:

•Air filter inspection

•Soft and hard system resets

•Database backup and restoration

•True revert to earlier software

•Creating facility and terminal loopbacks

•Creating diagnostic files

•Optic fiber cleaning

9.1 Air Filter Inspection

The Cisco ONS 15327 contains an air filter that should be removed and visually inspected approximately every 90 days, depending on the cleanliness of the operating environment. The filter is reusable and made of a gray open-cell polyurethane foam, specially coated to provide fire and fungi resistance. illustrates the reusable fan tray filter.

Figure 9-1 Inserting and removing the reusable fan tray air filter

Procedure: Inspect and Clean the Reusable Air Filter

Step 1 Grasp the metal tab at the edge of the filter and slide the filter out of the bracket while being careful not to dislodge any dust that may have collected on the filter.

Step 2 Visually inspect the filter material for dirt and dust.

Step 3 If the reusable air filter contains a concentration of dirt and dust, either vacuum the filter or wash it under a faucet with a light detergent.

Note   If possible, cleaning should take place outside the operating environment to avoid releasing dirt and dust near the equipment.

Step 4 If you washed the filter, let it air dry.

Warning   Do not put a damp filter back in the ONS 15327.

Step 5 Push the filter back into the shelf.

Note   On a powered-up ONS 15327, the fans start immediately after the fan tray is correctly inserted.

9.2 System Reset

You can reset the ONS 15327 XTC card using the Cisco Transport Controller (CTC), called a soft reset, or by physically reseating the XTC card, called a hard reset. A soft reset reloads the operating system, application software, etc., and reboots the XTC. A hard reset does the same operations as a soft reset, and also temporarily removes power from the XTC and clears all buffer memory.

Only apply a hard reset to a standby XTC. If you need to perform a hard reset on an active XTC, put the XTC into standby mode first by performing a soft reset on the card.

Note   A soft or hard reset of an active XTC card causes a standard Telcordia protection switch of less than 50 ms.

Procedure: Perform a Soft Reset

Step 1 Display the CTC node view.

Step 2 Right-click on the XTC card and click Reset Card from the pull-down menu.

Step 3 Click YES when the "Are You Sure?" dialog box appears.

Step 4 Click OK when the "Lost connection to node, changing to Network View" dialog box appears.

Step 5 Confirm that the XTC comes back up in standby mode after the reset.

Note   The XTC card takes several minutes to reboot. The Act/Stby LED glows amber during the reboot process. The AUTORESET alarm clears at the end of the boot process.

Procedure: Perform a Hard Reset

Note   To determine whether you have an active or standby XTC, position the cursor over the XTC card graphic to display the status.

Caution   Always use the supplied electrostatic discharge band when working with a powered ONS 15327. Plug the wristband cable into the ESD jack located on the front of the ONS 15327.

Step 1 If you need to perform a hard reset on an active XTC card, first perform a soft reset on the active XTC (see the "Perform a Soft Reset" section).

Step 2 When the XTC is in standby mode, unlatch both ejector levers on the XTC card.

Step 3 Physically pull the card partly out of the slot until the lighted LEDs go out.

Step 4 Wait 30 seconds. Reinsert the card and close the ejector levers.

Note   The XTC takes several minutes to reboot. The Act/Stby LED glows amber during the reboot process. The AUTORESET alarm clears at the end of the boot process.

9.3 Database Backup and Restore

When dual XTC cards are installed in the ONS 15327, each XTC card hosts a separate database. Therefore, the protect card's database is available if the database on the working XTC fails. You can also store a back-up of the database on the workstation running CTC. This operation should be part of a regular ONS 15327 maintenance program at approximately weekly intervals, and should also be completed when preparing an ONS 15327 for a possible service disruption.

Caution   If you are restoring the database on multiple nodes, wait five minutes between each database restore.

Procedure: Backup the Database

Step 1 Display the CTC node view.

Step 2 Click the Maintenance > Database tabs.

Figure 9-2 Backing up the ONS 15327 database

Step 3 Click Backup.

Step 4 Save the database on the workstation's hard drive or on network storage. Use an appropriate file name with the file extension .db, for example, database.db.

Step 5 Click Save and click OK on the Backup Database complete dialog box.

Procedure: Restore the Database

Note   The database must be restored to a compatible software version.

Step 1 Display the CTC node view.

Step 2 Click the Maintenance > Database tabs.

Step 3 Click Restore.

Step 4 Locate the database file stored on the workstation's hard drive or on network storage.

Step 5 Click the database file to highlight it.

Step 6 Click Open.

The Restore Database dialog box monitors the file transfer.

Figure 9-3 Restoring the XTC database

Step 7 Wait for the selected file to complete the transfer to the XTC.

9.4 True Revert to Earlier Software

True Revert allows the system to revert to the protect system software image and its attendant database. The reversion does not affect DCC connectivity or traffic on circuits provisioned prior to the activation of the working software load. All versions of ONS 15327 software support this feature. Versions of ONS 15454 software prior to CTC Release 2.2 are not compatible with True Revert and do not support this feature.

The ONS 15327 supports a working and protect software version on each XTC. The protect software version saves the provisioning that existed when the working load was activated. This means that the protect software load can only reinstate the circuits provisioned before the working load was activated. Circuits provisioned after the activation of the working load are lost during a True Revert.

Warning   Working and protect XTCs must have the same version of the protect software load to support True Revert.

Procedure: True Revert To Protect Software Load

Step 1 Display the CTC node view.

Step 2 Record the IP address of the node.

Step 3 Right-click the standby XTC card.

Step 4 Choose Reset Card from the pull-down menu.

Step 5 Click YES when the "Are You Sure?" dialog box appears.

Step 6 Click OK when the "Lost connection to node, changing to Network View" dialog box appears.

Step 7 Confirm that the XTC comes back up in standby mode after the reset.

Step 8 Click the Maintenance > Software tabs.

Step 9 Click Revert.

The Revert button activates the protect software load. The ONS node reboots and loses its connection to the CTC.

Step 10 Wait until the software upgrade finishes. This may take as long as 30 minutes.

Step 11 Close the browser.

Step 12 Restart the browser and log back into the node using the IP address you recorded in
Step 2.

The CTC applet for the standby software load is downloaded by the browser.

9.5 Loopbacks

You can perform facility and terminal loopbacks to test ONS 15327 electrical and optical ports and spans. Facility loopbacks test traffic connections to and from facility port connections on the ONS 15327 and are generally performed on site. shows a facility loopback that tests DS-1 port connections to and from XTC cards at Nodes 1 and 2. Users connect test equipment to the DS-1 ports on the MICs and then log into the node and invoke a facility loopback on the XTC card.

Figure 9-4 The ONS 15327 facility loopback process

Terminal loopbacks test port and span connections. shows a terminal loopback that tests a DS-1 connection between Node 1 and Node 2. The technician connects test equipment to the Node 1 XTC card, then logs into Node 2 and invokes a terminal loopback on the Node 2 XTC card.

Figure 9-5 The ONS 15327 terminal loopback process

When loopback testing is completed, the loopbacks are cleared from the XTC cards.

Caution   Performing a loopback on an in-service circuit is service affecting.

Procedure: Create a DS-1 Loopback

Step 1 In node view, double-click the XTC card where you will perform the loopback.

Step 2 Click the Maintenance > DS1 Loopback tabs.

Step 3 Under the Loopback Type column ( Figure 9-6), click the row of the desired DS-1 port and choose a loopback type, either Terminal (Inward) or Facility (Line).

Figure 9-6 Creating DS-1 loopbacks

Step 4 Click Apply and click Yes at the confirmation dialog box.

Setting up a loopback generates a LPBK alarm, which is normal. The alarm will clear when you remove the loopback.

Procedure: Clear a Loopback

Step 1 In node view, double-click the XTC card that has the loopback.

Step 2 Click the Maintenance > DS1 Loopback tabs.

Step 3 Under the Loopback Type column ( Figure 9-6), click the DS-1 row port and choose None.

Step 4 Click Apply and click Yes at the confirmation dialog box.

9.6 Creating Diagnostic Files

When working with ONS 15327 customer support, you may need to record system information to a file and send it to technical personnel for diagnosis.

Procedure: Create a Diagnostic File

Step 1 Display the CTC node view.

Step 2 Click the Maintenance > Diagnostic tabs.

Step 3 Click Retrieve Diagnostics File.

Step 4 In the Save dialog box, type a file name. Do not add an extension to the file name; the CTC extension is added automatically.

Step 5 Choose a directory where you want to save the file.

Step 6 Click Save. A dialog box confirms a successful file transfer. (The dialog box may take 20-30 seconds to display.)

Step 7 E-mail the diagnostic file to the address given to you by customer support.

9.7 Optic Fiber Cleaning

No special instructions apply when cleaning an optic fiber connected to an ONS node. Clean the fiber according to local site practice. If no local practice exists, use a CLETOP Real-Type or equivalent fiber optic cleaner and follow the product instructions.