Hansen, Ulrich Vestergaard B. (E R WP EN 342) wrote:
Can you recommend some good ones?
Freeware/Opensource is no requirement.
Testing req:
Http sessions
Tcp sessions
Udp strams
Multicast
Voice (QoS)
I mostly have used open source tools in the past; a brief rundown...
iperf is a nice simple tool; it does TCP and UDP including multicast,
and the UDP can be made to report jitter & loss in e.g. 1 second intervals.
rude and crude are pretty good for very low-level UDP testing, including
programmable traffic profiles. Don't be fooled by the fact they haven't
been updated in years - the problem is fundamentally no different:
http://rude.sourceforge.net/
There are about a zillion HTTP tools, but something simple like "ab"
might suffice.
If you're interested in multicast, "dbeacon" can be left running
indefinitely and generates nice web pages & delay, jitter & loss stats
including nice RRD graphs - e.g. http://external.net.ic.ac.uk/matrix
I've successfully used used iperf to load a link, then wireshark to
capture the VoIP traffic (SIP, RTP & RTCP) and dump out the RTCP stats.
It's also gained an RTP analyzer in the meantime, but I've never had
cause to use that.
The linux kernel has a in-built packet generator:
http://www.mjmwired.net/kernel/Documentation/networking/pktgen.txt
Google lists loads more e.g.
http://www.grid.unina.it/software/ITG/sdescr.php
...as well as commercial (and very pricey) products like Smartbits and
so forth.
It's a big field.
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