Extreme 3804 Supplementary Manual
Power On Self Test (POST)
Advanced System Diagnostics and Troubleshooting Guide
55
Power On Self Test (POST)
The POST actually consists of two test processes: a “pre-POST” portion that runs before the POST, and
the POST itself. The entire POST (both portions) runs every time the system is booted. It tests hardware
components and verifies basic system integrity. The POST can be configured to run in normal or
extended mode. The default is normal mode because it consumes less time.
the POST itself. The entire POST (both portions) runs every time the system is booted. It tests hardware
components and verifies basic system integrity. The POST can be configured to run in normal or
extended mode. The default is normal mode because it consumes less time.
The pre-POST test is a bootup process that tests CPU memory, Universal Asynchronous
Receiver/Transmitter (UART) parts, ASIC registers and memory.
Receiver/Transmitter (UART) parts, ASIC registers and memory.
The POST tests the following switch elements (depending on the module type: MSM or I/O module):
•
Register ASIC on the CPU
•
Real Time Clock
•
Management port PCI memory, PCI interface, and transceiver loopback
•
Register ASICs (Twister, Quake, MAC, Triumph ASICs)
•
Memory (Twister ACL, Quake external memory, MAC memory, Triumph external memory)
•
Built-in self test (BIST) in ASICs (Twister, MAC, Triumph)
•
Loop-back test (ready state initialization; MAC loop-back test; IP route loop-back test)
Related Commands
configure diagnostics [extended | fastpost | normal | off]
unconfigure switch all
show diagnostics {slot [msm-a | msm-b | <slot number>]}
show switch
Configuring the Boot-Up Diagnostics
To configure the boot-up diagnostics, use this command:
configure diagnostics [extended | fastpost | normal | off]
where:
extended
Specifies that the extended diagnostic routine be run each time the switch boots. The
extended POST routine takes the switch fabric and ports offline, and performs
extensive ASIC, ASIC-memory, and packet memory tests.
extended POST routine takes the switch fabric and ports offline, and performs
extensive ASIC, ASIC-memory, and packet memory tests.
fastpost
Specifies that the fastpost diagnostic routine be run each time the switch boots. The
fastpost routine takes the switch fabric offline and performs a simple ASIC test. The
fastpost routine is the default.
fastpost routine takes the switch fabric offline and performs a simple ASIC test. The
fastpost routine is the default.
normal
Specifies that the normal diagnostic routine be run each time the switch boots. The
normal POST routine takes the switch fabric and ports offline, and performs a simple
ASIC and packet loopback test on all the ports.
normal POST routine takes the switch fabric and ports offline, and performs a simple
ASIC and packet loopback test on all the ports.
off
Specifies that no diagnostic routine be run when the switch boots.