Network throughput test between 2 AIX servers

The easiest way to test throughput between 2 AIX servers is to do a FTP test, generating data transfer with ‘dd’ command.  This will provide the throughput/speed for the specified amount of data transfer:
#src-system> ftp dst-system
…
…
ftp>  put "|dd if=/dev/zero bs=32k count=10000" /dev/null
200 PORT command successful.
150 Opening data connection for /dev/null.
10000+0 records in
10000+0 records out
226 Transfer complete.
327680000 bytes sent in 1.406 seconds (2.277e+05 Kbytes/s)
local: |dd if=/dev/zero bs=32k count=10000 remote: /dev/null
ftp>bye

This is the same test IBM recommends in the redbook and also during a support call