Stress Test cluster

[Routerkid1]

What can I use, any thing free to generate connections ?

[cciesec2006]

Not sure about FREE; however, Spirent makes excellent products called
Web Avalanche and Web Reflector, where Web avalanche can generate
millions of connections such as http, https, FTP, ssh, msSQL, SQLnet, etc.
and Web Reflector sit behind the firewall caching these connections.

I used this device at my previous job to load test the Nokia IP390
and Nokia IP560 where we put so much load on the Nokia IP560 that
the Nokia IP560 just frozed and the only way to bring it back online was
to use the ON/OFF button

[flawless_cowboy]

You can use iperf to generate TCP or UDP connections, we recently put a cluster under several hundred Mbits of VPN traffic. We thought we might be hitting some limit on VPN traffic, as we seeing throughput not get above 380Mbps/sec (all VPN traffic). We were able to push it up to 500 Mbps/sec with iperf which is the cap on our WAN connection (yes its really a 500 Mbps WAN connection). Here is the link --

NLANR/DAST : Iperf - The TCP/UDP Bandwidth Measurement Tool