Linux tftp data packet increasing to improve transfer speed

[张廉]

Hi There
 I am doing setup tftp to download image via WAN/MAN link now. but the
 speed of download is quite slow.
 3.9MB file download vis tftp needs more than 27 seconds now.

I see there is way to increase the blocksize of data transfer from 512
 bytes to 65535.
 reference link:
 http://blackfin.uclinux.org/doku.php?id=setting_up_a_tftp_server.
 So I did a modification on /etc/xinetd.d/tftp, and made a test.  The
 result is not good, just same as before.
 Could anyone help to find whether the command is correct or wrong ?
 and guide me how to increase data size to improve transfer speed.

The link between 2 sites is around 200M MAN link.
 Below are modified tftp configuration file and command what I used:

m at server:/tmp$ tftp -v -l 10.150.25.102 -c  get Image.bin
 Connected to 10.150.25.102 (10.150.25.102), port 69
 getting from 10.150.25.102:Image.bin to Image.bin [netascii]
 Received 4094588 bytes in 29.5 seconds [1111030 bit/s]


service tftp
 {
         socket_type        = dgram
         protocol              = udp
         wait                    = yes
         user                    = root
         se rver                 = /usr/sbin/in.tftpd
         server_args          = -v --blocksize 16268 -s /tftpboot
         disable                = no
         per_source          = 11
         cps                     = 100 2
         flags                   = IPv4
 }

Thanks
 lian