CHAPTER 9
Flap List Troubleshooting
This document describes how to configure and use the Flap List Troubleshooting feature on the Cisco Cable
Modem Termination System (CMTS) routers. The flap list is a patented tool for the Cisco CMTS routers to
diagnose potential problems with a particular cable modem or with a particular cable interface. The flap list
tracks "flapping" cable modems, which are cable modems that have intermittent connectivity problems.
Excessive flapping could indicate a problem with a particular cable modem or with the upstream or downstream
portion of the cable plant.
•
Finding Feature Information, page 195
•
Hardware Compatibility Matrix for the Cisco cBR Series Routers, page 196
•
Prerequisites for Flap List Troubleshooting, page 196
•
Restrictions for Flap List Troubleshooting, page 197
•
Information About Flap List Troubleshooting, page 197
•
How to Configure Flap List Troubleshooting, page 199
•
How to Monitor and Troubleshoot Using Flap Lists, page 206
•
Configuration Examples for Flap List Troubleshooting, page 213
•
Additional References, page 213
•
Feature Information for Flap List Troubleshooting, page 214
Finding Feature Information
Finding Feature Information
Your software release may not support all the features that are documented in this module. For the latest
feature information and caveats, see the release notes for your platform and software release. The Feature
Information Table at the end of this document provides information about the documented features and lists
the releases in which each feature is supported.
Use Cisco Feature Navigator to find information about the platform support and Cisco software image support.
To access Cisco Feature Navigator, go to the link http://tools.cisco.com/ITDIT/CFN/. You do not require a
cisco.com login account.
Cisco cBR Series Converged Broadband Routers Troubleshooting and Network Management Configuration Guide
for Cisco IOS XE Fuji 16.8.x
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