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Cisco Employee

Traffic generator

Good morning all,

I have to implement some test for QoS on FR link.

For this purpose I need a traffic generator to simulate the traffic and its behaviour. The tool should generate flows based on IP Source/destination.

Is there any tool available in cisco site or IOS?

What else can I use to do this test?

Many thanks

Matteo

1 ACCEPTED SOLUTION

Accepted Solutions
Silver

Re: Traffic generator

All "Enterprise" images and most "Plus" contain a program TTCP which is a TCP traffic generator.

Just type in TTCP from the EXEC prompt., if you have two routers set one up as the receiver and the other up as the transmitter. on the receiver set the rTCP receive window side high (rcvwndsize 65535). On the transmitter set the IP address of the receiver and set the send nbuf to a number that equates to the amount of traffic you wish to send.

If you only have one router you can try and send it to the discard port (port 9) on a remote device, you need IP connectivty to the device but do not need to set it up to receive.

Also depending on the type of router you are trying to use do not expect to be able to generate high levels of traffic, but you should be able to geneate e1/T1 speeds.

A better approach would be to use the PC / Unix version of this tool (TTCPW for W32 or TTCP for Unix). These will give you a lot more options including the ability to use UDP which will significantly improve your throughput rate.

There is a good URL on CCO which covers the use of this tool on both PC's and Routers and has links to site where you can download the PC / Unix version

http://www.cisco.com/warp/public/471/ttcp.html

2 REPLIES
New Member

Re: Traffic generator

Hello Matteo -

You might want to try Q-Check, a free utility by NetIQ. They also have Chariot, which is the full-blown traffic generator and analyzer, but it costs money...

Netcom used to make the industry-standard traffic generator, but I think they may have been bought by someone. Try a search on 'Smartbits' or 'Smartflow'...

Hope that helps...

Silver

Re: Traffic generator

All "Enterprise" images and most "Plus" contain a program TTCP which is a TCP traffic generator.

Just type in TTCP from the EXEC prompt., if you have two routers set one up as the receiver and the other up as the transmitter. on the receiver set the rTCP receive window side high (rcvwndsize 65535). On the transmitter set the IP address of the receiver and set the send nbuf to a number that equates to the amount of traffic you wish to send.

If you only have one router you can try and send it to the discard port (port 9) on a remote device, you need IP connectivty to the device but do not need to set it up to receive.

Also depending on the type of router you are trying to use do not expect to be able to generate high levels of traffic, but you should be able to geneate e1/T1 speeds.

A better approach would be to use the PC / Unix version of this tool (TTCPW for W32 or TTCP for Unix). These will give you a lot more options including the ability to use UDP which will significantly improve your throughput rate.

There is a good URL on CCO which covers the use of this tool on both PC's and Routers and has links to site where you can download the PC / Unix version

http://www.cisco.com/warp/public/471/ttcp.html

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