D-1
D: Updating Software
Obtaining Software
A current software file, MSS4.SYS, is available on the distribution CD. You can obtain software updates
and release notes for the MSS4 from the Lantronix Web site (www.lantronix.com), or by using anonymous
FTP (ftp.lantronix.com).
For a software file that supports encryption (MSS4E.SYS), contact Lantronix directly.
Via the Web
The latest version of MSS4.SYS can be downloaded from the Technical Support area of the Lantronix Web
site.
Note: Netscape Navigator may try to open the file as an ASCII text file. To avoid this, hold down
the shift key when choosing the software file.
Reloading Software
The MSS stores software in Flash ROM to control the initialization process, operation, and command
processing. The contents of Flash ROM can be updated by downloading a new version of the operational
software via TCP/IP or MOP. Regardless of which protocol is used to update Flash ROM, the following
points are important:
The Flash ROM software file name, should not be changed.
The download file should be world-readable on the host.
There is a sixteen character length limit for the path name.
There is a twelve character limit for the filename.
Use the List Server Boot command to check settings before rebooting.
Note: Before using the Initialize Reload command, check your settings to ensure that you are
reloading the correct software file.
Reloading Sequence
If DHCP, BOOTP, or RARP is enabled on the MSS, the MSS will request assistance from a DHCP,
BOOTP, or RARP server before starting the download attempts. The MSS will then try TFTP and MOP
booting (in that order) provided that it has enough information to try each download method.
Downloading and rewriting the Flash ROM will take approximately two minutes from the time the
Initialize command is issued. If the download file cannot be found or accessed, the MSS can be rebooted
with the code still in Flash ROM. The OK/ACT LED will blink quickly while the MSS is booting (and
reloading code) and then slowly when it returns to normal operation.
Note: If you experience problems reloading Flash ROM, refer to Troubleshooting Flash ROM
Updates on page D-3.
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