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Diagnostics
Figure 10: Backplane health check paths (BlackDiamond architecture)
Control Bus
AFQM
ASIC
(Quake)
SE
ASIC
(Twister)
Control Bus
I/O Module (G8Xi)
System Health Checks: A Diagnostics Suite
Keep in mind that the goal of the diagnostics suite is to help users achieve the highest levels of network
availability and performance by having system hardware, software, and diagnostics work together to
reduce the total number of failures and downtime through:
• More accurate reporting of errors (fewer false notifications; more information about actual errors)
• Early detection of conditions that lead to a failure (so that corrective action can be taken before the
failure occurs)
• Automatic detection and correction of packet memory errors in the system's control and data planes
Diagnostic Suite Components
The components that make up the diagnostic test suite include:
• Power on self test (POST)
— Runs at system boot
— Offers configurable levels
• Runtime, slot-based diagnostics
— Normal, extended, and packet memory scan
— Run on demand by user command
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Control Bus
AFQM
ASIC
(Quake)
SE
ASIC
(Twister)
Master MSM (MSM-A)
(To all other slots)
CPU
Subassembly
Master MSM Daughter Card
CPU loads test packet
to MSM Fabric.
Test packet transferred to
I/O module Fabric on data
Control Bus
bus (fast path).
Test packet returned to
CPU on Control bus.
Advanced System Diagnostics and Troubleshooting Guide
NVRAM
CPLD
UART
PCMCIA
FLASH
SRAM
MGMT
DN_032A
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Troubleshooting
