Cabletron Systems SmartSTACK 10 ELS10-26, User Manual

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ELS10-26 Diagnostics and Troubleshooting
5-3
The operational parameters of the ELS10-26 software are also
protected by a checksum comparison. When the ELS10-26 reboots,
if the operational parameters of the ELS10-26 fail a checksum test
due to a power failure in the midst of a previous update, the
ELS10-26 automatically uses its backup version of the parameters.
5.1.4 Power-up Diagnostics Results
After completion of the power-up diagnostic sequence, both the
Power (Pwr) and Ready LEDs located on the front panel of the
ELS10-26 should be on.
5.2 RESPONSES TO FAILURES AT POWER-UP
How the ELS10-26 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 main element processor, the
ELS10-26 will halt execution and will not boot to operational
mode.
5.3 STATUS AND ACTIVITY INDICATORS
The front panel of the ELS10-26 includes LEDs that indicate the
status or activity of various system components. Figure 5-1 shows
the ELS10-26 front panel LEDs and buttons. The LEDs and buttons
are described in Tables 5-1 and 5-2.
Note: A backup version of the operational parameters is always stored in
non-volatile memory before any update is attempted.