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Understanding show cable modem Command States
This document explains cable modem online states in the Cisco 900 and 7200 Series Universal Broadband Routers (uBR), and it explains the reason why they fail setup. Information on the states appear after you issue the show cable modem command.
02 Nov 2004
There are a number of issues that can affect the performance and speed of cable modems in a Data-over-Cable Service Interface Specifications (DOCSIS) system. This document seeks to address the major causes of slow throughput from the perspective of a cable service provider.
24 Apr 2008
This document explains some troubleshooting steps used to determine the cause of Cable Modems dropping offline. Since, in the majority of cases, the cause will be a plant issue or low carrier-to-noise ratio, these issues will be the major emphasis of this document.
03 Sep 2006
The purpose of this tech note is to provide a complete setup guide for a cable modem (CM) network in a lab environment. This setup can be used as a first step before deployment to a customer network. It is important to note that a trouble-free setup in the lab does not necessarily mean...
26 Oct 2005
This document discusses the different states that Cable Modems (CMs) go through before coming online and establishing IP connectivity. The document highlights the most commonly used Cisco IOS® software troubleshooting commands to verify what state the CMs are in, and...
12 Jan 2006
...hardware used. Use the show controllers cable-modem mac state command to see the power level...typical output from the show controllers cable-modem mac state command that summarizes the state...
20 Jul 2012
There are many different scenarios and permutations with regards to physically wiring cable modem termination systems (CMTSs). You could have a sparse mode where upstream (US) ports on the CMTS are kept separate, a dense mode where signal is fed to multiple US ports, multiple CMTSs on the...
03 Apr 2006
This document explains the use of Static and Dynamic Map Advance and introduces a new Dynamic Map Advance feature that allows users to configure a hard-set limit-called the max-delay-so that the timing offset from rogue modems does not increment out-of-control. This document also addresses the...
24 Apr 2008
This document discusses the configuration of upstream scheduler mode for the Cisco Universal Broadband Router (uBR) series of Cable Modem Termination Systems (CMTS).
03 Apr 2006
This document provides a sample configuration for a Cisco uBR7100 Cable Modem Termination System (CMTS) that acts as a Dynamic Host Configuration Protocol (DHCP), Time-of-Day (ToD), and TFTP server. It also explains how to built the Data-over-Cable Service Interface Specifications...
08 Nov 2006