Linux – Running TFTP Server on specified port

The 1st thing I've spotted was that you are using "-s /tftpboot" in xinetd.conf and adding the dhcpd.conf "root-path" option. Setting the "-s" option for tftpd means that is the "/" directory as seen for tftp client. So your dhcpd.conf should only have "filname /pxeboot", without the root-path option.

From "man tftpd":

-s

Change root directory on startup. This means the remote host does not need 
to pass along the directory as part of the transfer, and may add security.
When -s is specified, exactly one directory should be specified on the command
line. The use of this option is recommended for security as well as compatibility
with some boot ROMs which cannot be easily made to include a directory name 
in its request.

In server args you have -s /tftpboot, but in your post you said the dir you're using is /tftpserver. The -s and path means the directory that you are using as the TFTP root directory. Change this to the path or the directory you want to use.

If /tftpboot doesn't exist you'll see an error in /var/log/messages and the daemon won't actually start.