qos traffic generator

[suthomas1]

Hello,

I am testing some qos policies to simulate traffic conditions through switches.
Can someone please recommend any known free software that could be installed in laptops for generating such traffic to facilitate tests.

Thanks.

[Mark Malone]

Hi not sure about free software but i do it in testing sometimes from a router and from DOS in my PC you ping the TOS value and that should increase the queue once it matches the DSCP value
so example TOS 184 = DSCP 46

MARK#ping ip
Target IP address: 172.26.19.87
Repeat count [5]: 100
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]: y
Source address or interface: 172.26.19.40
Type of service [0]: 184 --->dscp is eF
Set DF bit in IP header? [no]:
Validate reply data? [no]:
Data pattern [0xABCD]:
Loose, Strict, Record, Timestamp, Verbose[none]:
Sweep range of sizes [n]:
Type escape sequence to abort.

And from DOS i followed this link and it worked for me
https://robert.penz.name/654/howto-to-quick-test-a-dscp-based-qos-system/

TOS to DSCP Chart
https://www.google.ie/search?q=tos+to+dscp+chart&client=firefox-b&dcr=0&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjI9d6b_8zYAhXIA8AKHVNrADwQ_AUICigB&biw=1920&bih=919#imgrc=OnJ1shJQhg_anM:

[Joseph W. Doherty · Accepted solution]

I don't know of a free traffic generator that allows you to specify how you want traffic ToS (and/or CoS) tagged.

What I've done, though, is use free traffic generators to generate traffic that I mark at the first network device that can do do. This, of course, before the traffic gets to the part of the network where you want to "test" how loading of that QoS marking impacts the network.

PS:
A free DOS traffic generator I like to use is PCATTCP (unsure it still can be found), configured to send UDP traffic at some rate.