From: ccie2be (ccie2be@nyc.rr.com)
Date: Thu Jul 29 2004 - 11:50:38 GMT-3
Hey Richard,
I don't dispute or disagree with what you're saying but how do know that 4
simultaneous pings with a packet size of 1500 will load the channel to over
80%? How do you know what load exactly that will put on the channel? If
you don't know exactly what load that puts on the channel, how do you know
that that is NOT, for example, a 65% load or 75 % load?
Again, I'm not trying to give you a hard time, but if you (or anyone for
that matter) don't know fairly accurately how much bandwidth is being
generated, then how can you know if the load is more or less than a given
threshold?
Getting back to your suggestion of generating multiple simultaneous pings by
using multiple telnet sessions, can you explain how that would be done?
Let's say I want the multiple pings to come from rtr A and go to rtr B?
And, currently, I'm on rtr C?
I know how to telnet to rtr A but how do I create 4 telnet sesions and then
how do I make each telnet session generate a ping at the same time?
Can you walk me through this ?
Thanks, Tim
----- Original Message -----
From: "Richard Dumoulin" <richard.dumoulin@vanco.es>
To: "Group Study" <ccielab@groupstudy.com>
Sent: Thursday, July 29, 2004 9:52 AM
Subject: RE: Generating enough pings to make dialer load threshold kick in
> Oh yes, 4 simultaneous pings with a packet size of 1500 should easily load
> the channel. And as Alexei said, don't forget load-interval 30.
> For the formula, you only need to generate 80% of 64Kbps. It does not
matter
> how much exactly, does it ?
>
> --Richard
>
> -----Original Message-----
> From: ccie2be [mailto:ccie2be@nyc.rr.com]
> Sent: jueves, 29 de julio de 2004 15:38
> To: Richard Dumoulin; Group Study; Dan Shechter
> Subject: Re: Generating enough pings to make dialer load threshold kick in
>
>
> RE: Generating enough pings to make dialer load threshold kick inSounds
> interesting, but how would I do that?
>
> Are you saying that 1 ping would be generated by each telnet session
> simultaneously?
>
> Actually, I think I should ask this question a bit differently.
>
> I guess what I'm really trying to get at is this.
>
> Suppose I want to generate 50kbps of ping traffic. Is there a formula I
can
> use to compute what the ping settings should be to do so?
>
> Knowing how to do this could be very useful for all sorts of testing
besides
> load-threshold. Testing QoS comes to mind.
>
> PS: I know there are 3rd party products that will do this perfectly but,
> for the moment and forseeable future, I don't expect Cisco will allow such
> products to be used in the lab.
>
> Thanks Richard
>
>
> ----- Original Message -----
> From: Richard Dumoulin
> To: ccie2be ; Group Study ; Dan Shechter
> Sent: Thursday, July 29, 2004 9:22 AM
> Subject: RE: Generating enough pings to make dialer load threshold kick
in
>
>
> You could telnet 4 times to the router and send ping of 1500 bytes in
each
> telnet session. Then on the 5th telnet session you could monitor the
backup,
>
> --Richard
>
> -----Original Message-----
> From: ccie2be [mailto:ccie2be@nyc.rr.com]
> Sent: jueves, 29 de julio de 2004 15:03
> To: Group Study; Dan Shechter
> Subject: Re: Generating enough pings to make dialer load threshold kick
in
>
>
>
> Thanks Dan for the response.
>
> However, I specifically want to test with a high threshold and want to
> know what values for ping will generate enough traffic to exceed that
> threshold regardless of what the threshold is 75%, 80%, 90%.
>
> Anyway to do that?
>
> Also, is there any point in setting the packet size to something greater
> than 1500 bytes?
>
> Thanks
> ----- Original Message -----
> From: "Dan Shechter" <danshtr@yahoo.com>
> To: "ccie2be" <ccie2be@nyc.rr.com>
> Sent: Thursday, July 29, 2004 8:57 AM
> Subject: Re: Generating enough pings to make dialer load threshold kick
in
>
>
>
> > from both sides of the interface:
> >
> > ping 1.1.1.1 size 1500 rep 10000
> >
> > and on the interfaces set the load interval to the min: interface X
> > load 30
> >
> >
> > HTH,
> > Dan
> >
> >
> > --- ccie2be <ccie2be@nyc.rr.com> wrote:
> >
> > > Hi guys,
> > >
> > > Let's say the requirement is to have the 2nd bri circuit come up
> > > when the 1st
> > > circuit is at 80% utilization.
> > >
> > > What ping parameters should I adjust to generate enough traffic to
> > > get the 1st
> > > circuit over 80% utilization?
> > >
> > > I know I can change the repeat and packet size values, but what
> > > values should
> > > I use?
> > >
> > > TIA, Tim
> > >
> > >
> >
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