To trigger TFTP Get operation, the SNMP manager need to set the
value to activate(1); and submit to the bridge to start
the TFTP Get procedure. The status (eocBrTFTPGetStatus) will go
from inProgress(1) status back to the initial normalOrComplete(0)
status. TFTP Get will attempt to retrieve a firmware/driver file
from the TFTP server whose address is given by eocBrTFTPServer.
The filename is given by eocBrTFTPFilename. Both
eocBrTFTPServer and eocBrTFTPFilename must be correct
for the TFTP operation to proceed.