Specific Power-Up Tests; Power-Up Diagnostics Results; Responses To Failures At Power-Up - Cabletron Systems SmartSTACK ETHERNET ELS10-27 User Manual

SmartSTACK Ethernet ELS10-27 Diagnostics and Troubleshooting
7. In addition, the Port Link LEDs will turn on for those ports with
good links and the Segment Status LEDs will turn on (or ßash) when
the selected status condition is present.
Note: If a critical component fails diagnostics, the CPU LED will turn off and
the SmartSTACK Ethernet ELS10-27 will attempt to reboot. If the CPU
LED does not stay on, contact Cabletron Systems Global Call Center.
Refer to Section 1.2.
5.1.2 Specific Power-up Tests
The power-up diagnostic tests performed on the SmartSTACK Ethernet
ELS10-27 include:
¥ Flash Boot sector Checksum Test.
¥ Instruction and Data Memory Tests.
¥ Main FLASH Checksum Test.
¥ Ethernet Loopback Test, internally to the PHY.

5.1.3 Power-up Diagnostics Results

After completion of the power-up diagnostic sequence, both the Power
(Pwr) and CPU LEDs located on the front panel of the SmartSTACK
Ethernet ELS10-27 should be on.

5.2 RESPONSES TO FAILURES AT POWER-UP

How the SmartSTACK Ethernet ELS10-27 responds to failures detected
during power-up depends on the seriousness of the failure. For example,
it will operate if a non-critical component, such as the out-of-band
management port, fails diagnostics. However, in the event of a critical
failure, such as a failure of the Microprocessor or Flash Boot Sector
Checksum, the SmartSTACK Ethernet ELS10-27 will halt execution and
will not become operational. In the event of a Main Flash Checksum
failure, the SmartSTACK Ethernet ELS10-27 will attempt to Bootp/TFTP
a new image into the unit.
5-2