Re: ICMP Query!!!

LOL!!

I had a hard time working out that first email about the ICMP and PIM joins
I have to also confess :-)

My understanding:

If the ICMP is terminating on a router, then its simply Control Plane
traffic as far as that router is concerned.

If the ICMP traffic is only transit traffic and therefore not terminating on
the router in question, it simply Data Plane traffic.

Simple.

Sadiq

On Sat, Nov 13, 2010 at 12:15 PM, Marko Milivojevic <markom_at_ipexpert.com>wrote:

> ICMP as used in IPv4 and ICMPv6 only share a common name. They really
> have very little in common as far as their purpose in networks goes.
>
> Otherwise, yes - in IPv6, ICMP and multicast have things to do with
> each other. However, in IPv6 there is no IGMP, so that's a moot point.
>
> --
> Marko Milivojevic - CCIE #18427
> Senior Technical Instructor - IPexpert
>
> FREE CCIE training: http://bit.ly/vLecture
>
> Mailto: markom_at_ipexpert.com
> Telephone: +1.810.326.1444
> Web: http://www.ipexpert.com/
>
> On Sat, Nov 13, 2010 at 07:11, Carlos G Mendioroz <tron_at_huapi.ba.ar>
> wrote:
> > Marko,
> > I have to disagree with you too, is it in my nature ?
> >
> > First of all, ICMP and IGMP have 3 out of 4 letters in common,
> > and not only that, in the same place. That must mean something! :)
> >
> > Second, as soon as you go IPv6, ICMP takes the chore of multicast
> > signalling at the LAN, so it has to do with mcast there.
> >
> > -Carlos
> >
> > Marko Milivojevic @ 12/11/2010 21:00 -0300 dixit:
> >> I would just like to point out that ICMP has nothing to do with IGMP
> >> and multicast.
> >>
> >> --
> >> Marko Milivojevic - CCIE #18427
> >> Senior Technical Instructor - IPexpert
> >>
> >> FREE CCIE training: http://bit.ly/vLecture
> >>
> >> Mailto: markom_at_ipexpert.com
> >> Telephone: +1.810.326.1444
> >> Web: http://www.ipexpert.com/
> >>
> >> On Fri, Nov 12, 2010 at 18:39, Paul Negron <negron.paul_at_gmail.com>
> wrote:
> >>> It is true that they help convey information or make sure a path is
> clear to
> >>> send larger packets, but ICMP is not intended to help create state
> within
> >>> the control plane.
> >>>
> >>> Like I said....
> >>>
> >>>
> >>> IGMP helps to create a path in which Traffic will use.
> >>> ICMP uses the data plane that a control plane protocol created.
> >>>
> >>> Does anyone else have anything useful to contribute?
> >>>
> >>> I would always love to hear another explanantion that can be useful and
> I'm
> >>> sure CCIE KID would too, unless the "KID" already gets it.
> >>>
> >>>
> >>> Narbik?
> >>>
> >>>
> >>> --
> >>> Paul Negron
> >>> CCIE# 14856 CCSI# 22752
> >>> Senior Technical Instructor
> >>> www.micronicstraining.com
> >>>
> >>>
> >>>
> >>>> From: Carlos G Mendioroz <tron_at_huapi.ba.ar>
> >>>> Date: Fri, 12 Nov 2010 17:39:56 -0300
> >>>> To: Paul Negron <negron.paul_at_gmail.com>
> >>>> Cc: CCIE KID <eliteccie_at_gmail.com>, Cisco certification
> >>>> <ccielab_at_groupstudy.com>
> >>>> Subject: Re: ICMP Query!!!
> >>>>
> >>>> I would call ICMP redirect packets a control thing though.
> >>>> And when using ICMP probes (echo request/reply) as part of a IP SLA
> >>>> construct, they are a control thing too.
> >>>> What about packet too big ?
> >>>>
> >>>> In fact, Internet Control Message Protocol sounds a lot to control :)
> >>>>
> >>>> -Carlos
> >>>>
> >>>> Paul Negron @ 10/11/2010 14:21 -0300 dixit:
> >>>>> I apologize, B I meant to state:
> >>>>>
> >>>>>> IGMP packets are used to create state on the Router that receives
> them.
> >>>>>> Since it is used to create state, it is a part of the Control Plane
> process.
> >>>>>> It joins so that trees can be built, Although it is PIM that builds
> them.
> >>>>>>
> >>>>>> ICMP is generating traffic and is not associated with building
> ANYTHING. It
> >>>>>> is considered Data Plane traffic. It uses paths that have already
> been setup
> >>>>>> by a Control Plane Protocol, like OSPF or EIGRP or PIM for that
> matter.
> >>>>> I accidentally stated ICMP twice.
> >>>>>
> >>>>> Paul
> >>>> --
> >>>> Carlos G Mendioroz B <tron_at_huapi.ba.ar> B LW7 EQI B Argentina
> >>>
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> >>
> >>
> >>
> >>
> >>
> >
> > --
> > Carlos G Mendioroz B <tron_at_huapi.ba.ar> B LW7 EQI B Argentina
>
>
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CCIEx2 (R&S|Sec) #19963
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