Foundry Networks M2404C, M2404F manual Built-In Self Test Bist, Bist Test Results Review

Foundry NetIron M2404C/M2404F Metro Access Switches

Built-In Self Test (BIST)

The BIST performs a set of basic hardware and configuration validity tests. Tests in the BIST are sorted into several groups – for example, the tests of the Power Supply units belong to a Power Supply Test group.

Startup BIST - The BIST is performed automatically on startup. The results are summarized on the terminal before the switch banner.

BIST by request - A user may request BIST execution at any time by using a CLI command.

The current BIST status may be read and cleared by using CLI commands. When the BIST detects a failure in any of the tests, it causes the Status LED indicator to blink.

The switch supports the following tests:

•CPU Core Test

•CPU Interface Test

•Data Buffer Test

•Power Supply Test

•On-Board Power Test

•Fan Test

•Temperature Test.

Table 1 describes the tests.

Table 1: Description of the Built-in Tests

Test	Description
CPU Core Test	Checks CPU block integrity
CPU Interface Test	Checks the existence of the UART (register write/read operation).
	Both COM1 and COM2 are checked.
Data Buffer Test	Checks the integrity of NVRAM database.
Power Supply Test	Checks the existence and status of the DC power supplies.
	If both DC power supplies are connected, the test will result with
	Passed. When one of the DC power supply is disconnected, the test
	will result with Failed.
Fan Test	Checks the status of the 3 fans.
On-Board Power Test	Checks the 5 On-Board Power levels: 3.2V, 2.5V, 1.8V, 1.5V and
	1.25V.
Temperature Test	Validates temperature ranges inside the device and tests temperature
	sensors.

BIST Test Results Review

If any of the BIST tests fail, the FLT LED starts blinking. To display BIST results, perform the following steps:

1. Connect a terminal cable to Console port.

January 2007 © 2007 Foundry Networks, Inc. 23