Chapter 6 Router Field Diagnostic; Diagnostics Overview - Cisco 12416 Installation And Configuration Manual

Diagnostics Overview

Diagnostics Overview
Note
Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
6-2
Easy access to the most current diagnostics software—Because the field
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diagnostic software is now maintained as a separate image, the most recent
version is always available on Cisco.com, without regard to the Cisco IOS
software release currently in use.
This chapter describes the following topics:
Diagnostics Overview, page 6-2
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Field-Programmable Gate Array Overview, page 6-3
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Using the diag Command, page 6-8
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diag Command Output Examples, page 6-13
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More than 100 diagnostic operations for each router line card exist, in addition to
diagnostics for the switch fabric and route processor cards. These operations
include the following:
Processor tests
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Memory tests
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Component tests
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Major data path tests
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Field-programmable gate array (FPGA) image updates (on some line cards)
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When using Cisco IOS Release 12.0(21)S or 12.0(21)ST or later, the default
download method changes from the MBus to the switch fabric to make the process
faster. It takes about 1 minute to obtain test results from the switch fabric
compared to 15 minutes from the MBus.
While diagnostics are running, the line card being tested is taken offline and is
controlled by the diagnostic software. The diagnostics affect only the line card
being tested; the other line cards remain online and continue to pass traffic
normally. Diagnostics do not affect system performance.
Chapter 6 Router Field Diagnostics
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