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The value of each DS setting (stored in the EEPROM) is protected by its own checksum. Every time the DS stores new setting value into the EEPROM it recalculates the checksum and saves it into the EEPROM along with the new setting data. Every time the DS reads out the value of a certain setting it verifies this setting's checksum. If the checksum error is detected (for any setting) the DS enters an error mode.
Once entered, the error mode cannot be exited other then by rebooting the DS- either by power-cycling it or executing the Reboot (E) command.
DS operation in the error mode is characterized by the following:
The above also applies to two most important settings that define DS visibility on the network- the MAC-address (FE) setting and the IP-address (IP) setting. When invalid, actual values of these settings are substituted with default ones, which are 0.1.2.3.4.5 and 192.168.100.40 respectively. This means that the DS will still be accessible through the network, but at default MAC and IP.
* Default values can be changed through custom profile