C H A P T E R
4-1
Cisco uBR905 Router Hardware Installation Guide
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4
Troubleshooting
This chapter provides basic installation troubleshooting information. The chapter includes the
following sections:
•
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
•
Note
This chapter provides only hardware troubleshooting information that does not require
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
Cisco uBR905 Cable Access Router Front Panel LEDs
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Cisco uBR900
SERIES
OK
ACT
LINK
1
2
3
4
DS
US
DSNR
MSG
CATV
