3Com 3C8S5007 - SuperStack II PathBuilder S500..., User Manual

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E
T
ROUBLESHOOTING
This appendix contains the following sections:
■
Using the Monitor Utility
■
Normal LED Meanings
■
Error LED Meanings
■
Performing Loopback Tests on the Flex-WAN Serial and Ultra-WAN
CSU/DSU Interfaces
■
Response to Loopback Assertions from Link Partner on Flex-WAN
Serial and Ultra-WAN CSU/DSU Interfaces
■
Performing T3/E3 Loopback Tests
■
Performing a Memory Dump
Using the Monitor
Utility
If your PathBuilder switch is unable to boot from the software, you can
attach a console to the console port and access the firmware monitor
utility.
If your operating system does not supply a TFTP or BootP server, you can
use 3Com’s. These servers are supplied with the Upgrade Management
Utilities. See Upgrading Enterprise OS Software for information about
installing and using these server applications.
To access the monitor utility from the software, enter:
MONitor
CAUTION: The monitor utility stops the normal routing/switching
operation of the PathBuilder switch, and you must reset the PathBuilder
switch to exit the firmware.
The following commands are available from the monitor utility: