Chapter 4 Troubleshooting; Troubleshooting Overview - Cisco uBR905 Installation Manual

Troubleshooting
This chapter provides basic installation troubleshooting information. The chapter includes the
following sections:
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•
•
•
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This chapter provides only hardware troubleshooting information that does not require
Note
access to the router's command-line interface (CLI) or knowledge of CLI commands. For
more advanced troubleshooting, refer to the Cisco IOS online document Troubleshooting
Tips for the Cisco uBR905 Cable Access Router.

Troubleshooting Overview

Installation problems with Cisco uBR905 routers are commonly due to the cable system and its
topography. LEDs on the front panel of the Cisco uBR905 router reveal operational status and help you
determine problem areas. See Figure 4-1 for the layout of the LEDs on the router's front panel; see
Table 1-1 on page 1-7 for a description of these LEDs.
Figure 4-1
OL-0598-01 (9/2000)
Troubleshooting Overview, page 4-1
Initialization and Self-Test Problems, page 4-2
Troubleshooting Subsystems, page 4-4
Using the Reset Switch, page 4-10
Further Contacts, page 4-11
Cisco uBR905 Cable Access Router Front Panel LEDs
OK
CATV
LINK
ACT 1 2 3 4
DS US
Cisco uBR905 Router Hardware Installation Guide
C H A P T E R
MSG
DSNR
Cisco uBR900
SERIES
4
4-1