Cisco Systems uBR7200 Series - page 28

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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide

78-5897-01

Chapter4 Troubleshooting the System

Understanding Show Command Responses

Table4-18 Show Interface Cable Upstream Command Field Descriptions

Field Description

Cable Indicates the location of the upstream interface

Upstream is

up/...administratively down Indicatesthe administrative state of the upstream interface

Received broadcasts Number of broadcast packets received through this

upstream interface

multicasts Number of multicast packets received through this

upstream interface

unicasts Number of unicast packets received through this interface

discards Number of packets discarded by this interface

errors Sumof all errors that prevented upstream transmission of

packets through this interface

unknown protocol Number of packets received that were generated using a

protocol unknown to the Cisco uBR7246

packets input Number of packets received through this upstream

interface that were free from errors

corrected Number of error packets received through this upstream

interface that were corrected

uncorrectable Number of error packets received through this upstream

interface that could not be corrected

noise Number of upstream packets corrupted by line noise

microreflections Number of upstream packets corrupted by

microreflections

Guaranteed-rate service queue

depth Number of bandwidth requests queued up in the

Guarantee-rate queue. This queue is only available to

modems that have a reserved minimum upstream rate in

their Class of Service

Best-effort service queue depth Number of bandwidth requests queued up in the

Best-effort queue. This queue is available to all modems

that do not have any reserved rate on the upstream

Total Modems On This

Upstream Channel Numberof cable modems currently sharing this upstream

channel.This field also shows how many of these modems

are active

Current Total Bandwidth

Reserved Total amount of bandwidth reserved by all modems

sharing this upstream channel that require bandwidth

reservation. The Class of Service for these modems

specifiessome non-zero value for the guaranteed-upstream

rate. When one of these modems is admitted on the

upstream, this field value is incremented by this

guaranteed-upstream rate value

Contents

Main CHAPTER Troubleshooting the System Using a Cable Modem at the Headend to Verify Downstream Signals Managing Cable Modems on the HFC Network Configure Sync Message Interval Verify Sync Message Interval Activate Cable Modem Authentication Verify Cable Modem Authentication Activate Cable Modem Upstream Address Verification Verify Cable Modem Upstream Address Verification Configure Dynamic Contention Algorithms (Cable Insertion Interval, Range, and Data Backoffs) Configure the Dynamic Map Advance Algorithm Configure Per Modem Filters Page Configure the Maximum Number of Hosts Attached to a Cable Modem Configure Cable Modem Registration Timeout Clear Cable Modem Reset Verify Clear Cable Modem Reset Clear Cable Modem Counters Verify Clear Cable Modem Counters Configure Traffic Shaping Configure Downstream Rate Limiting and Shaping Configure Upstream Rate Limiting and Shaping Configure Spectrum Management (without the Cisco MC16S Cable Modem Card) Blind Strategies and Time Scheduled Combined Guided Frequency Hop Page Spectrum Management Debug and Test Commands Show Cable Hop Command Page Debug and Test Commands Polling Cable Modems Enable SNMP Configure Remote Modem Monitoring Verifying Remote Query Information Monitoring and Maintaining Remote Querying Understanding Show Command Responses General Show Commands Show Cable Modem Page Page See the following sample for detailed output of theshow cable modem command: Show Cable Modem Maintenance Show Interface Cable Page Page Table4-18 describes the fields shown in the show interface cable upstreamdisplay. Field Description Page Page Enhanced Show Interface Upstream Output Show Interface Cable SID See the following display for the SIDs connected to the specified interface: See the following connection information for all SIDs on the specified interface: See the following connection information for SID 1 on the specified interface: Page Show Cable QoS Profile Troubleshooting Using Cable Flap Lists Page Page Display the Flap List Page Page Troubleshoot with the Flap List Set Cable Flap List Aging Verify Cable Flap List Aging Set Cable Flap List Insertion Time Verify Cable Flap List Insertion Time Set Cable Flap List Power Adjustment Threshold Verify Cable Flap List Power Adjustment Threshold Set Cable Flap List Miss Threshold Verify Cable Flap List Miss Threshold Set Cable Flap List Size Verify Cable Flap List Size Clear Cable Flap List Customize Other Flap List Values and Related Commands Performing Amplitude Averaging Enable or Disable Power Adjustment Set Frequency Threshold to Affect Power Adjustment Setting Downstream Test Signals Configure Unmodulated Test Signals Configure PRBS Test Signals Verify Test Signal Output Pinging Unresponsive Cable Modems Ping a Cable Modem Verify the Ping Using Cable Interface Debug Commands Debug Cable ARP Requests Debug Environmental Monitor Messages Debug Cable MAC Protocol Errors Activate Debug of Baseline Privacy Debug Baseline Privacy Activity Debug Cable MAC Messages Debug Cable Maps Debug Cable Modems Debug Cable PHY Messages Activate QoS Debug Debug Cable Modem Ranging Messages Debug Upstream Messages Debug Cable Modem Registration Requests Debug Cable Modem Reset Messages Debug Spectrum Management Debug Channel Allocations Debug CMTS Transmissions Debug Upstream Channel Change (UCC) Messages Debug Upstream Channel Description (UCD) Messages Managing the Cisco uBR7246 VXR Clock Card Clear Clock Counters Force Alternate Clock Set Midplane TDM Clock as Primary Reference Display Clock Values Show Clock Hardware Information and Register Values Show Clock Diagnostic Information Page Show Clock Frames Show General Information