Foundry NetIron M2404C and M2404F Metro Access Switches
Troubleshooting and Monitoring (Rev. 03)
Built-in Self Test (BiST)
© 2008 Foundry Networks, Inc.
Page 4 of 55
Built-in Self Test (BiST)
The BiST performs a set of basic tests of the device hardware and of its configuration validity.
Tests in the BiST are sorted into several groups – for example, tests of each of power supply
belong to a Power Supply Test group.
BiST Tests
There are three kinds of BiST tests:
1.
Startup BiST
- The BiST is performed automatically on startup. The results
are summarized on the terminal before the device banner.
Upon power-on, the device executes a
startup BiST
. The device displays a
summary of the results on the terminal. The results are either
Passed
or
Failed
,
as in the following report example:
BUILT-IN SELF TEST
------------------
CPU Core Test : Passed
CPU Interface Test : Passed
Data Buffer Test : Passed
Power Supply Test : Passed
On-board Power Test : Passed
Fan Test : Failed
2.
BiST by request
- At any time a user may request BiST execution, by using the
self-test
command in Privileged (Enable) mode.
The BiST allows the user to perform the self-test available in CLI enable mode or through
SNMP. Objects added to BIST MIB allow execution of the self-test, monitoring of the test
execution status, and retrieval of the results.
Only the part of the test mechanism that is available through the CLI enable mode
self-test
command will be executed through SNMP. The port test results will not be affected.
If the status of all tests in BiST is
Passed
, the Status LED emits a steady light.
If the status of one or more tests is
Failed
, the Status LED blinks. Use the
show self-test
command
in Privileged (Enable) mode to see the source of the problem.
NOTE
If any BiST test fails, the switch
Status
LED starts to blink.
3. Periodic BiST – for more information please refer to section “
Periodic
Monitoring
”.
Table 1: Built-in Tests
Built-in Test
Description
CPU Core Test
On boot, the entire DRAM is tested. This test is run once at startup.
CPU Interface Test
Checks the existence of the UART (register write/read operation).