From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Thu Jul 29 2004 - 12:29:43 GMT-3
Did someone say DoS attack? ;)
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
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________________________________
From: Richard Dumoulin [mailto:richard.dumoulin@vanco.es]
Sent: Thursday, July 29, 2004 10:28 AM
To: Brian McGahan; Group Study
Subject: RE: Generating enough pings to make dialer load threshold kick
in
What's good with Brian is he has always something new to teach ! I just
tested with an ethernet and it really saturates the line :)
Thank you
--Richard
-----Original Message-----
From: Brian McGahan [mailto:bmcgahan@internetworkexpert.com]
Sent: jueves, 29 de julio de 2004 17:21
To: ccie2be; Richard Dumoulin; Group Study
Subject: RE: Generating enough pings to make dialer load threshold kick
in
Tim,
Set the timeout to 0 in the ping and the router will generate
the traffic close to line rate.
HTH,
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: Thursday, July 29, 2004 9:51 AM
> To: Richard Dumoulin; Group Study
> Subject: Re: Generating enough pings to make dialer load threshold
kick in
>
> 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
> > > >
> > > >
> > >
>
This archive was generated by hypermail 2.1.4 : Sun Aug 01 2004 - 10:12:05 GMT-3