Preventive Maintenance

This chapter describes two preventive maintenance tasks for the Cisco 6260 digital subscriber line (DSL) access concentrator:

3.1 Backing Up Software

We recommend that you maintain, on a TFTP server, current copies of two files for each Cisco 6260 system:

The Cisco IOS software image
The configuration file (running-config)

If you keep copies of these files on a TFTP server, you can easily recover from a fault in an NI-2 card: simply replace the NI-2 card, and download the software image and configuration file from the TFTP server. Remember to update your backup files whenever you change your configuration or upgrade your Cisco IOS software.

Follow these steps to copy the Cisco IOS software image and configuration file to a TFTP server:

Step 1 Log in to the Cisco 6260 node whose software you wish to back up.

Step 2 Enter the dir command to display the names of the files:

6260# dir

Step 3 Enter a copy command to copy the IOS software file to the node's TFTP server:

6260# copy flash:<image-name> tftp

Step 4 Enter a second copy command to copy the configuration file to the node's TFTP server:

6260# copy running-config tftp

3.2 Air Filter Maintenance

You must periodically clean or replace the two air filters in the Cisco 6260 DSL access concentrator.

Once a month (or more often in dusty environments), examine the air filters and clean or replace them if they are dirty. Keep a log recording the date of each filter cleaning and filter replacement.

You can clean or replace the air filters while the Cisco 6260 remains powered up and fully operational.

The remainder of this section explains how to remove, clean, and replace the filters.

3.2.1 Required Tools and Equipment

To clean the air filters, you need one of the following:

Vacuum cleaner (preferred)
Clean water
Mild detergent, if the filter is very dirty

New air filters (product number FILTER-6260=) are the only parts you need if you decide that the old filters need replacing.

3.2.2 Removing an Air Filter

This procedure tells you how to remove an air filter from the Cisco 6260 chassis. Perform this procedure for each of the two air filters in each chassis.

Step 1 Unscrew the captive screw and pull off the metal bezel that covers the air filters. (See Figure 3-1.)

Step 2 The air filter slides out from the top of the fan tray. Gently pull the filter toward you to remove it from the tray.

Step 3 If you are replacing the air filter, discard it and skip to the "Replacing the Air Filter" section.

Step 4 If you wish to clean the air filter, go to the next procedure, "Cleaning the Air Filter."

Figure 3-1: Removing the Bezel and Air Filters

3.2.3 Cleaning the Air Filter

This section tells you how to clean a Cisco 6260 air filter. Skip to the next procedure if you are replacing an old filter with a new one.

Use one of the following methods to clean the air filter:

Vacuum cleaning is preferred because you need not dry the filter afterwards. Vacuum the filter until it is clean and free of dust.
Placing the filter under a stream of plain water is equally effective. Hold the filter under the water with the metal grille facing up and let the water flow down through the filter. (This orientation causes the water to flow through the filter in the direction opposite from the usual air flow, so you dislodge rather than embed matter trapped in the filter.) Allow the filter to dry thoroughly before reinstalling it.
If the filter is too dirty to be completely cleaned with a vacuum or with plain water, immerse the filter in a solution of hot water and mild detergent. Rinse the filter thoroughly in clear water and allow it to dry completely before reinstalling it.

3.2.4 Replacing the Air Filter

Use this procedure to insert the air filter into the chassis.

Step 1 Hold the air filter so that

The side with the metal grille is facing up.
One of the long sides goes in first.

Step 2 Slide the filter into its slot above the fan tray.

Step 3 Replace the bezel that covers the fan tray and tighten the captive screw to secure the bezel.

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