Pinging a pool of hosts at the same time

[stephenb2]

That was the last step. I am down to just over 9 seconds now.

Thanks everyone!

[Hooovahh]

I tried several methods but the one that worked the fastest for me was to use an external application from Sysinternals.  I had a similar need when I was looking to discover which ethernet cDAQ chassis were connected to my PC.  I had a range of IP addresses to ping but whenever I would ping them it would take a long time to go through a list of say 100 IP addresses.  I ended up using a command line tool by sysinternals which can ping multiple IP addresses simultaneously then report which ones were found.  Here is the link.

http://forums.ni.com/t5/LabVIEW/Discover-cDAQ-Ethernet/m-p/2817584#M824878

Edit the IPs.txt in that after extracting the zip to a folder and it should return which IPs it found.  For me this usually takes on the order of a few hundred milliseconds for a few hundred IPs.