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This chapter describes procedures for managing cable modems and includes the following sections:
You can use CCM to download Cisco IOS software images to a single cable modem or to all registered cable modems associated with a specific upstream channel. The download cable modem software feature is supported for:
See the "Enabling and Configuring SNMP Traps" section.
Step 2 If you have used Autodiscovery to deploy uBRs, you must set the SNMP write community string for the cable modems. If you do not set the SNMP write community string the software download fails.
Step 3 Select the Cisco uBR7200 series universal broadband router, cable modem, line card, or upstream channel that contains the cable modems.
Step 4 From the right-click menu, choose Maintenance > Modem SW Download.
The Modem SW Download dialog box appears.
Step 5 Check the cable modem version by clicking Show Version in the Modem SW Download dialog box.
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Caution Image files are provided by the vendor. Downloading the wrong image to a cable modem can result in the loss of functionality. Before downloading an image to a cable modem, check with the vendor to ensure that the proper image is applied to the cable modem. |
Step 6 Click the Download tab and specify the:
Step 7 Click Download.
The Scheduler dialog box appears.
Step 8 Click OK to perform the download, or enter the date and time for the download to occur.
Because the cable modem software download operation is not automatic, a log is kept for all successful downloads.
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Note You cannot obtain download results after clearing the log history. If you stop the cable controller and restart it, the log history is cleared. |
From the Modem SW Download dialog box, click the Summary tab, and click Clear History.
You can only cancel the software image download if there is a problem with the traps and the cable modems are waiting indefinitely; then, you can cancel the download for specified modems or for a uBR.
Step 2 To cancel the download:
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Caution No error is reported if you make a mistake editing the vendorTags.txt and userTags.txt files. Update the files only if you are knowledgeable about products and product IDs. Follow the file formats precisely. |
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Note The vendor and product names are case sensitive. |
The vendorTags.txt file appears showing a file format example.
Step 2 Enter the following information:
Step 3 Save and close the vendorTags.txt file.
Step 4 To verify the newly added vendor and products in the vendor tags list, click the Tags tab in the Modem SW Download dialog box, and click Vendor Tags.
Step 5 To apply your changes to the vendorTags.txt file, click Update Tags.
The vendorTags.txt file appears.
Step 2 To delete a vendor, remove all the lines with vendor and vendor product information.
Step 3 Save and close the vendorTags.txt file.
Step 4 To verify the removal of the vendor and products in the vendor tags list, click the Tags tab in the Modem SW Download dialog box and click Vendor Tags.
Step 5 To apply your changes to the vendorTags.txt file, click Update Tags.
Step 2 In the vendorTags.txt file, delete a vendor product by removing the line containing the product and product ID.
Step 3 Save and close the vendorTags.txt file.
Step 4 To verify the removal of the vendor product in the vendor tags list, click the Tags tab in the Modem SW Download dialog box, and click Vendor Tags.
Step 5 To apply your changes to the vendorTags.txt file, click Update Tags.
The userTags.txt file appears.
Step 2 Enter the following information:
Step 3 Save and close the file.
Step 4 To apply your changes to the userTags.txt file, click the Tags tab in the Modem SW Download dialog box, and click Update Tags.
Step 5 To verify the change in the user tags list, click User Tags.
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Note Before creating any user tag group, define the vendor name and product name in the vendor.txt file. |
See the "Adding a Vendor and a Product" section.
Step 2 Enter your newly created user tag name (group name) and list the cable modems that share the same image.
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Caution If you are unsure about the image that a cable modem uses, check with the cable modem vendor. Creating a new user tag that groups cable modems that do not share the same image can cause modem malfunctions after downloading the software image. |
Step 3 Save and close the file.
Step 4 To verify the change in the user tags list, click User Tags.
Step 5 To apply your changes to the userTags.txt file, click the Tags tab in the Modem SW Download dialog box, and click Update Tags.
In the following example, the user tag group, myGroup, groups two cable modems myModem1 and myModem2 that share the same image:
Step 2 Remove the lines containing the user tags.
Step 3 Save and close the file.
Step 4 To verify your changes in the user tags list, click User Tags.
Step 5 To apply your changes to the userTags.txt file, click the Tags tab in the Modem SW Download dialog box, and click Update Tags.
By using CCM, you can rehome cable modems between the primary and secondary uBRs. You can load balance upstream or downstream connections, or recover failures by instructing the cable modems to move to a new downstream or upstream channel by using CCM.
Once rehoming has been activated, you cannot stop it. It is only possible to cancel rehoming if the cable modems are waiting indefinitely. Rehoming continues to run until one or both of the following actions occur:
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Note If you have used AutoDiscovery to deploy uBRs, you must set the SNMP write community string for the uBR through the AutoDiscoveryConfig.spec file. If you do not set the SNMP write community string, rehoming fails. |
In order to rehome the cable modems successfully, you must turn on the cmonline/offline trap in both the primary and secondary uBRs.
Step 2 From the right-click menu, choose Maintenance > Modem Rehoming.
The Modem Rehoming dialog box appears.
Step 3 In the New Frequency and Channel ID area:
Step 4 To disconnect an active connection and force a rehome, click Force Rehome on active call.
Step 5 Click Rehome.
Step 2 From the right-click menu, choose Maintenance > Modem Rehoming.
The Modem Rehoming dialog box appears.
Step 3 Click the OperStatus tab.
Step 4 To view the status of all cable modems that are in the rehoming process, click Status.
Step 5 To view the results of all the cable modems for which the rehome action was successful, click Result.
Step 6 To clear history log for all cable modems for which rehoming was successful, click Clear Results History.
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Note You cannot obtain download rehoming results after clearing the log history. If you stop and restart the cable controller, the log history is cleared. |
Step 2 From the right-click menu, choose Maintenance > Modem Rehoming.
The Modem Rehoming dialog box appears.
Step 3 Click the Cancel tab.
Step 4 Choose one of the following commands:
Step 2 To view secondary downstream information, select the uBR that contains the cable modems.
Step 3 From the right-click menu, choose Maintenance > Modem Rehoming.
The Modem Rehoming dialog box appears.
Step 4 Click the Frequency tab.
Step 5 To view secondary uBR downstream information, click Information.
Step 6 To view secondary uBR downstream frequency information, click Frequency.
Posted: Tue Feb 25 04:58:26 PST 2003
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