Re: ICMP Query!!!

Very Interesting Response.

I guess I primarily viewed ICMP as testing the Control Plane/ Data Plane
with the Majority of ICMP Query types:

* 0 = Echo Reply (3ping response2)
* 8 = Echo Request (3ping query2)
* 9 = Router Advertisement (RFC 1256)
* 10 = Router Solicitation (RFC 1256)
* 13 = Time Stamp Request
* 14 = Time Stamp Reply
* 17 = Address Mask Request
* 18 = Address Mask Reply

I know my definition is a little Narrow but it does help differentiate ICMP
from protocols like RSVP, PIM, EIGRP that strictly represent Control Plane
from a Routing Switching perspective.

As far as the view that because ICMP uses the CPU being a CLEAR definition,
this I would disagree with. What would Process Switching be then? Control
Plane or Data Plane activity?

Carlos and Ron do make a good point to expand my Narrow definition though.
:-)

Paul

-- 
Paul Negron
CCIE# 14856 CCSI# 22752
Senior Technical Instructor
www.micronicstraining.com
> From: <ron.wilkerson_at_gmail.com>
> Reply-To: <ron.wilkerson_at_gmail.com>
> Date: Fri, 12 Nov 2010 23:58:17 +0000
> To: Paul Negron <negron.paul_at_gmail.com>, Carlos G Mendioroz <tron_at_huapi.ba.ar>
> Cc: CCIE KID <eliteccie_at_gmail.com>, Cisco certification
> <ccielab_at_groupstudy.com>
> Subject: 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.
> 
> 
> Sent from my Verizon Wireless BlackBerry
> 
> -----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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