Re: ICMP Query!!!

Agree with carlos...
I've always thought of control plane as anything that the cpu has to look at. Some icmp packets require the cpu, so I'd classify those icmp as control plane packets.

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-----Original Message-----
From: Paul Negron <negron.paul_at_gmail.com>
Sender: nobody_at_groupstudy.com
Date: Fri, 12 Nov 2010 16:39:10
To: Carlos G Mendioroz<tron_at_huapi.ba.ar>
Reply-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!!!

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,  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  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
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