WB-2P-LR5. User manual
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2.
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•
Option 43 analysis
When Option 43 has been received, suboption 8 is analyzed (vlan_tag):
if there is a suboption and it is different from current VLAN tag, DHCP exchange is initiated in new
VLAN;
suboption is absent or present and does not differ from the current VLAN tag: suboptions with codes
5, 6, and 7 are analyzed to determine the server address and the names of the configuration files and
software.
3. Option 66 analysis
If Option 43 is not received from DHCP server or it is received but the system fails to extract the server address,
Option 66 will be searched. If the system fails to obtain the firmware file name, Option 67 will be searched. They
are used for TFTP server address and the firmware file path extraction respectively. Then, configuration and
firmware files will be downloaded from Option 66 address via TFTP.
Special aspects of configuration updates
Configuration file should be in
.tar.gz
format (this format is used when configuration is saved from the web
interface in the «System» – «Configuration management» tab). Configuration downloaded from the server will be
applied automatically and does not require device reboot.
Special aspects of firmware updates
Firmware file should be in
.tar.gz
format. When the firmware file is loaded, the device unpacks it and checks its
version (using 'version' file in tar.gz archive).
If the current firmware version matches the version of the file obtained via DHCP, firmware will not be updated.
Update is performed only when firmware versions are mismatched. When the firmware image is written into the
device flash memory, the Power indicator will flash green, orange and red in succession.
Do not power off or reboot the device, when the firmware image is written into the flash memory. These
actions will interrupt the firmware update that will lead to the device boot partition corruption. The device
will become inoperable. To restore the device operation, use the instruction provided in
recovering after firmware update failure