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4-30   SmartCell ZX-250 User Guide
Saving Core Dumps
  Switch Administration
If the problem is corrected, enter the 
update firmware
 command to continue with the upgrade process. However, if 
you are unable to correct the problem, use the 
df
 (download flash) command and a TFTP/Bootp server to replace the 
operating software on your SmartCell ZX-250. Follow the procedure outlined below:
s•
Set up TFTP/Bootp server software on a workstation. 
¢•
Connect both the TFTP/Bootp server and the SmartCell ZX-250 to your Ethernet network. Make 
sure that the TFTP/Bootp server can be reached by the SmartCell ZX-250 Ethernet interface.
••
Connect a dumb terminal (or PC running terminal emulation software) to the SmartCell ZX-250 
Terminal port.
T•
Copy the SmartCell ZX-250 operating software image into the appropriate location on the 
TFTP/Bootp server.
Q•
Set up the TFTP/Bootp server tables (or equivalent file) with the SmartCell ZX-250 MAC address 
and IP address. You may also need to specify the path to the image file to be downloaded.
–•
From the terminal connection, enter the 
reboot
 command.
••
When the following message appears,
“Press any key to exit to boot load prompt. “
stop the countdown by pressing any key. The boot load prompt (=>) appears on the terminal screen.
G•
Enter the 
df s
 command. The SmartCell ZX-250 contacts the TFTP/Bootp server and downloads 
the operating software into its flash RAM.
=>df s
You've requested a Switch Software download
Are you sure?(Y/N)y
Initializing ethernet...
Starting Bootp...
   Boot file: c:\tftpboot\images\server.ima
Using TFTP to get bootfile "c:\tftpboot\images\server.ima" .
...........................................................................
...........................................................................
...........................................................................
...........................................................................
...................................................
Validity checks of the Switch Software Downloaded file...
All Validity checks OK
Programming downloaded image into Switch Software section, please wait...
New Switch Software programmed successfully
=>
n•
Enter the 
go
 command to start the SmartCell ZX-250.
4.8
SAVING CORE DUMPS
The SmartCell ZX-250 core dump feature allows you to specify a local Ethernet host where, in the event of a system 
failure, the SmartCell ZX-250 sends a copy of its memory. SmartCell ZX-250 system memory is saved to two files, 
one containing CPU memory (
core_cpu
), the other common memory (
core_cmn
). These files can then be sent to 
Cabletron customer support for analysis. 
2p›F
To use the core dump feature, the local Ethernet host must be running TFTP server 
software, and you must have write access to the TFTP directory.