
308656-14.00 Rev 00
3-1
Chapter 3
Troubleshooting an Operational Problem
This chapter describes how to solve problems with the basic operation of the
hardware and software. It assumes that you have already determined the scope of
your problem, as described in Chapter 2.
Topic Page
Damaged Router 3-2
Power Problem 3-2
Blown Fuse 3-2
LEDs Are Off 3-3
Router Won’t Boot 3-3
Checking the Boot PROMs 3-6
Making Sure the Router Software Image Is Correct 3-6
Making Sure All Slots Use the Same Router Software Image and Configuration
File
3-6
Lost Password (BN Routers) 3-10
No Space Left on Memory Card 3-11
Memory or Buffer Problem 3-12
Bad Forward Receive Buffer Checksum Errors 3-17
Fault Message 3-20
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