BootP doesn not work after updating to Exec Firmware version 4.1
140NOE77101 version 4.1 and greater.
The reason why this happens is because a verification step was added in 'Exec Frimware version 4.1'
This step caused the 140NOE77101 to perform a check for the subnet mask other than 000.000.000.000.
To resolve the problem, specify a subnet mask in the bootp configuration.