Cisco UBR924 - Manual

Cisco UBR924

Cisco UBR924 – Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.

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Table of Contents:

  • Page 2 – Related Features and Technologies; Platforms
  • Page 3 – Prerequisites; — To the headend via CATV coaxial cable; Note; Supported MIBs and RFCs; Cisco Standard MIBs:; — Cisco Product MIB
  • Page 4 – List of Terms
  • Page 5 – CMTS—Cable Modem Termination System.
  • Page 6 – narrowband—A single RF frequency.
  • Page 7 – CMTS to Cable Modem Network Topology; Figure 1
  • Page 8 – Troubleshooting Steps; Step 1—Understand How Basic Initialization Works; Step 1—Understand How Basic Initialization Works
  • Page 10 – Step 2—Connect to the Cisco uBR924
  • Page 11 – Step 3—Display the Cisco uBR924’s MAC Log File; . These fields show how the Cisco uBR924 progresses
  • Page 13 – Step 4—Interpret the MAC Log File and Take Action
  • Page 14 – Event 1—Wait for the Link to Come Up; Event 2
  • Page 15 – Event 3—Obtain Upstream Parameters; The
  • Page 16 – Event 5—Establish IP Connectivity
  • Page 17 – Event 8; field shows the filename containing the transmission; Event 9; A successful registration is indicated by the; Comply with Baseline Privacy
  • Page 18 – Enter the Maintenance State; Step 5—Use Additional Troubleshooting Commands; You can use other; and debug cable modem commands to troubleshoot different; Command
  • Page 19 – Command Reference
  • Page 20 – show controllers cable-modem; show controllers cable-modem number; Syntax Description; No default behavior or values.; Command Modes; Privileged EXEC; Command History; number
  • Page 21 – Examples
  • Page 22 – Table 2
  • Page 25 – Related Commands; Command Description
  • Page 26 – show controllers cable-modem bpkm; show controllers cable-modem number bpkm
  • Page 27 – Table 3
  • Page 28 – show controllers cable-modem des; show controllers cable-modem number des
  • Page 29 – DES engine registers are displayed in the following example:; Release; Table 4
  • Page 31 – show controllers cable-modem filters; show controllers cable-modem number filters
  • Page 32 – Table 5
  • Page 34 – show controllers cable-modem lookup-table; show controllers cable-modem number lookup-table
  • Page 35 – The mini-slot lookup table is displayed in the following example:
  • Page 38 – show controllers cable-modem mac; errors
  • Page 39 – Example 1
  • Page 41 – Example 2; Example 3; . Collectively presenting these fields provides you with a
  • Page 42 – Table 6
  • Page 44 – Example 4
  • Page 47 – Example 5; , the information shown in the
  • Page 49 – Table 8 describes the fields shown in the display.
  • Page 53 – show controllers cable-modem phy; receive; transmit
  • Page 56 – show controllers cable-modem tuner; show controllers cable-modem tuner; There are no key words or arguments for this command.; Defaults
  • Page 57 – Field
  • Page 58 – Debug Commands
  • Page 59 – debug cable-modem bpkm; Debugs Cisco uBR924 privacy errors.; events; Debugs events related to cable baseline privacy.; packets; Debugs baseline privacy packets.
  • Page 60 – debug cable-modem bridge; Debugs Cisco uBR924 interrupts.; debug cable-modem mac; Troubleshoots the Cisco uBR924 MAC layer.; debug cable-modem map
  • Page 61 – This command has no keywords or arguments.
  • Page 62 – Debugs baseline privacy information on a Cisco uBR924.; debug cable-modem error
  • Page 67 – entries while in the maintenance_state are normal when; using the verbose keyword.; Realtime MAC log display.; MAC layer management messages.
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Troubleshooting Tips for the Cisco uBR924 Cable Access Router 1

Troubleshooting Tips for the
Cisco uBR924 Cable Access Router

Feature Summary

This document describes the Cisco IOS troubleshooting commands that may be used by cable
service providers to verify communication between a Cisco uBR924 cable access router and other
peripheral devices installed in the HFC headend such as a Cisco uBR7200 series universal
broadband router, a DHCP server, and a TFTP server.

Benefits

The Cisco uBR924 cable access router troubleshooting system provides the following benefits:

•

A MAC-layer system log file that provides a snapshot of detailed reasons why an interface might
reset, along with all the negotiations that occurred between the Cisco uBR924 cable access router
and the CMTS. Over 220 possible description fields exist in this log, which is displayed using the
show controllers cable-modem 0 mac log command from privileged EXEC mode.

•

Debug does not need to be turned on in order to troubleshoot a Cisco uBR924 cable access router.

•

The progression of normal data-over-cable communication events is clearly explained,
simplifying the resolution of faulty system connections.

•

Troubleshooting and diagnostic tasks can be performed on the Cisco uBR924 from a remote
location using TELNET.

Restrictions

When using the Cisco uBR924 cable access router, keep the following restrictions and limitations in
mind:

•

The Cisco uBR924 is able to implement multiple classes of service (CoS) on the cable interface;
however, separate CoS streams are only available when the cable access router is connected to a
headend that supports multiple CoS per cable access router. In addition, the configuration file
downloaded to the cable access router must specify the use of multiple classes of service.

•

If the Cisco uBR924 cable access router is connected to a DOCSIS 1.0 headend that does not
support multiple CoS per cable access router, voice and data will be mixed, and voice traffic will
be transmitted on a best effort basis. This may cause poorer voice quality and lower data
throughput when calls are being made from the cable access router’s telephone ports. Voice
quality may also be affected when transmitting or downloading large files, or at other times when
network traffic is heavy.

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Summary

Page 2 - Related Features and Technologies; Platforms

Related Features and Technologies 2 Cisco IOS Release 12.0(5)T Note The Cisco uBR924 cable access router is typically configured at the headend. Most cable service operators do not permit local configuration at subscriber sites. Caution Before attempting to reconfigure a Cisco uBR924 cable access ro...

Page 3 - Prerequisites; — To the headend via CATV coaxial cable; Note; Supported MIBs and RFCs; Cisco Standard MIBs:; — Cisco Product MIB

Related Documents Troubleshooting Tips for the Cisco uBR924 Cable Access Router 3 Prerequisites In order to use the Cisco uBR924 cable access router for data-over-cable applications, the following conditions must be met: • The Cisco uBR7200 series universal broadband router or other DOCSIS-based CMT...

Page 4 - List of Terms

List of Terms 4 Cisco IOS Release 12.0(5)T — Cisco Flash MIB — Bridge MIB — IF MIB — MIB-II • Cisco VoIP MIBs: — Cisco Voice IF MIB — Cisco Voice Dial-Control MIB — Cisco Voice Analog IF MIB — Cisco Dial-Control MIB • Radio Frequency Interface Specification—Developed by the Multimedia Cable Network ...

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