Intel Express 510T, User Manual

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681872.bok : 68187201 19 Mon Apr 20 15:35:05 1998
Recovering from Start-up Failure
Express 510T Switch
19
Using Maintenance Mode
Purpose
Maintenance Mode offers three facilities:
■
It allows you to force the switch to load a specified software file
from any specified TFTP server.
■
It provides an emergency facility to force boot the switch from a
specified boot server if the switch cannot boot from Flash Mem-
ory. From Maintenance Mode the switch is forced to issue a
BOOTP request and the name of the boot software to a specified
boot server. This can be useful in cases where the boot server
being used does not support the use of a bootptab file.
■
It runs tests on hardware and provides this diagnostic informa-
tion.
Note
Loading software to the switch in Maintenance Mode
should only be done as a last resort, the reason being that
the software and configuration already resident in the Flash
Memory is overwritten and lost.
Important considerations
There are certain points which need to be considered when using
Maintenance Mode:
■
In Maintenance Mode, the switch is not operational and the
expansion board ports cannot be used.
■
Only simple command-line access is possible via the
Console
port.
■
There will be a delay before the command prompt is seen; this is
due to a hardware test routine being completed.
To enter Maintenance
Mode
To enter Maintenance Mode:
1
Press the
Reset
button on the front of the switch (using a
pointed tool — such as a bent paper clip) and hold it until the
SYSTEM
LED flashes green quickly (5 times per second).
2 Release the
Reset
button.
3
Attach a VT100-compatible terminal to the serial port on the
front panel using a serial cable.
4 Press the Enter key a couple of times until the command prompt
appears on the screen of the terminal.