Verifying Power-On Self-Test (Post) - Brocade Communications Systems SilkWorm 2400 Hardware Reference Manual

Chapter 2 Installation

Verifying Power-On Self-Test (POST)

The following table lists the diagnostic tests automatically run during POST.
Table 2-3
TEST
Memory Test
Port Register Test
Central Memory Test
Port Loopback Test
POST behaves differently depending on the boot method. A power cycle (power off &
power on) is considered a cold boot. All other boots from a powered-on state (per reboot,
panic, etc.) are considered warm boots.
POST execution per cold boot executes the long version of Memory Test. POST
execution per warm boot executes a shorter version of Memory Test. Boot time with
POST varies depending on the boot method.
As the POST successfully performs each of the tests, a message, "
via the Telnet.
After the switch completes the POST, the port module returns to a steady state from the
flashing states shown during the tests.
If a yellow port module light is displayed or is slowly flashing, this indicates that the port
is in a failed state and diagnostic output should be examined to determine the source of
failure.[ See Table 3-2 for other light indications.]
If error conditions are encountered, they can be displayed via Telnet after the switch
completes the POST.
2-10
POST Tests
BRIEF DESCRIPTION
Checks CPU RAM memory.
Checks the ASIC registers & SRAMs.
Checks the motherboard SRAMs.
Checks all of the switch's hardware:
frames transmitted, are looped back, and received
is displayed
Passed,"