Cisco UBR7246VXR 빠른 시작 매뉴얼 - 페이지 21
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7
Troubleshooting the Installation
This section contains information to help installers and technicians troubleshoot the hardware installation.
Figure 13 shows the general troubleshooting strategy used to troubleshoot the hardware. Refer to this flow chart as necessary,
and follow the steps to isolate hardware problems to a specific subsystem.
For cable-specific commands for the Cisco uBR7246VXR universal broadband router, refer to Cisco Broadband Cable
Command Reference Guide at the following URL:
http://www.cisco.com/en/US/products/hw/cable/ps2217/prod_command_reference_list.html
Resolve the problem if possible or contact the Cisco Technical Assistance Center.
Figure 13
Troubleshooting Strategy for Startup Problems
Reseat cable
No
Cable interface
interface
End
cards and
card
restart
LEDs OK?
Yes
Digital
Troubleshoot
No
data
headend
End
connections
setup for
enabled?
RF and data
Yes
System
startup
successful
Identify Startup Problems
Startup problems are commonly caused by source power problems or a board (network processing engine, I/O controller, port
adapter, or cable interface line card) that is not properly connected to the midplane. With the exception of the fan tray and
network processing engine, LEDs indicate all system states in the startup sequence. By checking the state of the LEDs, you can
determine when and where the system failed in the startup sequence.
1. First check that you are properly plugged into the power source. Then verify that the cards are properly installed. If the port
adapter ENABLED LED remains off after you have verified that it is properly installed, verify that the hardware revision
of the port adapter in question is supported by the Cisco uBR7246VXR. Use the show diag command (Router# show
diag slot) to determine the type of port adapter and then check the product website to determine compatibility.
2. The system cannot operate unless the I/O controller and network processing engine are installed properly. Check that these
modules are properly installed in the chassis.
Turn on
DC OK
system power
LED on?
Yes
Fans
operating?
Check system
state with
interface card
LEDs
Yes
Check system
state with I/O
controller LEDs
No
Interface card
LEDs OK?
I/O
controller
LEDs
OK
Check the
headend
setup
Yes
Check system
state with port
adapter LEDs
Digital
No
data
connections
enabled?
Port
adapter
Yes
enabled
LEDs
on?
Yes
Troubleshoot
No
DC OK
power
LED on?
subsystem
Yes
Troubleshoot
No
Fans
cooling
operating?
subsystem
Yes
I/O
Troubleshoot I/O
No
controller
controller
LEDs
and restart
OK
Yes
Port
Troubleshoot
No
adapter
port adapters
enabled
and restart
LEDs
on?
Yes
No
No
No
Obtain
No
technical
assistance
End
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