How to change the block size in tftpd to transfer large files efficiently

I have installed the TFTP client application by following the below link: https://askubuntu.com/questions/201505/how-do-i-install-and-run-a-tftp-server By default, the block size of the **TFTP packet header is 512 bytes**. I am trying to increase the blocksize by adding the --blocksize 1468 flag into /etc/xinetd.d/tftp file by following the below reference: https://askubuntu.com/questions/644031/tftpd-hpa-how-can-i-set-blksize-option After making the required changes by following the above link still I am getting the same 512 Data packet size. Can anyone share me the code for the same so I can change the block size configuration for the same?