Want to see how fast your network speeds are between machines/LPARs/etc? This can always be a little tricky to do because there are a lot of factors in plan – and a lot of potential bottlenecks; such as disks.
You can bypass disks ever being touched in your test by connecting via FTP to another server, and sending a block of data directly to /dev/null. This will stop the server from writing it to disk, and therefore give you pure network speeds:
1. Connect to a server via FTP from another server.
2. Enter: put “|dd if=/dev/zero bs=3M count=1000″ /dev/null
3. Monitor the speeds with your favorite monitoring solution topas, top etc.