From: ccie2be (ccie2be@nyc.rr.com)
Date: Wed Nov 24 2004 - 11:14:03 GMT-3
Hi John,
Thanks for letting me know about this command.
From the output below, I don't see any option for setting a specific rate of
traffic such as 32kbps or 64kbps, etc.
Am I missing something?
Tim
----- Original Message -----
From: "John Wong" <johnwk@unimelb.edu.au>
To: "ccie2be" <ccie2be@nyc.rr.com>
Cc: "Brian McGahan" <bmcgahan@internetworkexpert.com>; "Group Study"
<ccielab@groupstudy.com>
Sent: Wednesday, November 24, 2004 8:56 AM
Subject: Re: Using IOS to generate a specific volume of traffic
> Hi Tim,
>
> How about the hidden TTCP command? Check out
> http://www.cisco.com/warp/public/471/ttcp.html
>
> Cisco ported this darn useful tool from the UNIX
> world (among other things, like mrinfo, etc..).
>
> Below is a sample of how it looks like.
>
> R6#ttcp
> transmit or receive [receive]: tr
> Target IP address: 10.0.0.1
> perform tcp half close [n]:
> send buflen [8192]:
> send nbuf [2048]:
> bufalign [16384]:
> bufoffset [0]:
> port [5001]:
> sinkmode [y]:
> buffering on writes [y]:
> show tcp information at end [n]:
>
> ttcp-t: buflen=8192, nbuf=2048, align=16384/0, port=5001 tcp -> 10.0.0.1
> %Connect failed: Connection refused by remote host
>
>
> Hope this helps.
>
>
> ccie2be wrote:
> > Brian,
> >
> > That sounds like an excellent idea. Thank you.
> >
> > Out of curiosity, why would I shape rather than police on the downstream
> > router?
> > Does it make a difference? Actually, my hunch is that either would work
for
> > this purpose, do you agree?
> >
> > Thanks, Tim
> >
> > ----- Original Message -----
> > From: "Brian McGahan" <bmcgahan@internetworkexpert.com>
> > To: "ccie2be" <ccie2be@nyc.rr.com>; "Group Study"
<ccielab@groupstudy.com>
> > Sent: Tuesday, November 23, 2004 2:25 PM
> > Subject: RE: Using IOS to generate a specific volume of traffic
> >
> >
> > Tim,
> >
> > You could do extended ping with a timeout of 0 and then shape
> > the outbound interface to your desired rate. This would have to be done
> > downstream of your QoS config you're trying to test.
> >
> > Brian McGahan, CCIE #8593
> > bmcgahan@internetworkexpert.com
> >
> > Internetwork Expert, Inc.
> > http://www.InternetworkExpert.com
> > Toll Free: 877-224-8987 x 705
> > Outside US: 775-826-4344 x 705
> > 24/7 Support: http://forum.internetworkexpert.com
> > Live Chat: http://www.internetworkexpert.com/chat/
> >
> >
> >
> >>-----Original Message-----
> >>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> >
> > Of
> >
> >>ccie2be
> >>Sent: Tuesday, November 23, 2004 12:24 PM
> >>To: Group Study
> >>Subject: Using IOS to generate a specific volume of traffic
> >>
> >>Hi guys,
> >>
> >>Is there a tool within IOS that can be used to accurately generate a
> >
> > given
> >
> >>amount of traffic?
> >>
> >>For example, suppose I want to test a MQC shaping or policing
> >>configuration
> >>and I want to generate a continuous stream of traffic at 65k to see
> >
> > what
> >
> >>happens when the cir is 64k. Is there a way to do this ?
> >>
> >>I know that by using ping and setting the packet size and repeat count
> >
> > I
> >
> >>can
> >>generate traffic, but it seems that using this method doesn't
> >
> > translate to
> >
> >>a
> >>specific rate.
> >>
> >>TIA, Tim
> >>
> >>
> >
> > _______________________________________________________________________
> >
> >>Subscription information may be found at:
> >>http://www.groupstudy.com/list/CCIELab.html
> >
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
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