Toshiba T300MVi User Manual download pdf (Page 31)

Forcing the unit to adopt the new IP address completes only half of the ARP

configuration process. In addition to the IP address being changed, the unit

also automatically configures its subnet mask to a temporary value of

255.255.255.255. This setting essentially allows only the computer that issued

the ping command to communicate with the unit. From this computer, then, the

user must also access the unit’s web page via a web browser, or its console via

a telnet session, in order to write the IP address to the filesystem. Until the new

IP address is written to the filesystem, the IP address change is only temporary.

If the unit loses power or is otherwise reset prior to submitting/setting the new

IP address, the previous IP address and subnet mask settings will return.

Note that if the IP address is to be written to the filesystem by performing a

“submit” via the unit’s web page, that network elements such as HTTP proxy

servers may relay the web page request for the configuring computer. The unit,

seeing the HTTP request from a computer other than that which performed the

initial “ping”, will ignore such a request. Therefore, be sure to bypass or disable

any proxy servers at least temporarily when using this configuration method.

For security reasons, once the ARP method of configuration has been

successfully completed (i.e. the IP address has been written to the filesystem),

the ARP method of configuration will be disabled, and all future attempts at

using this method will be ignored by the unit. It is possible, however, to re-

enable the ARP method via a console command (refer to section 13.3).

12.2 Console Method

The console method of configuration is achieved via a text-based console

interface, accessible over the RS232 port and a telnet interface. The RS232

console is accessed by connecting the port to a computer’s serial (COM) port,

and then running a terminal emulation program, such as Windows®

HyperTerminal. If the ARP method of initial configuration is not used, then the

RS232 console must be accessed. More information about the console

interface and its commands can be found in section 13.

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Toshiba T300MVi User Manual Page 31