From: Paul Cosgrove (paul.cosgrove@heanet.ie)
Date: Mon Jul 14 2008 - 15:11:36 ART
Hi John,
Indeed you mentioned that the question was ambiguous in your email.
Everyone here asked questions to clarify their understanding so that is
nothing unusual.
In this particular email you asked a question for which a number of
answers could have been given. You suggested two of these answers and
noted that they seemed the same.
There is more to rate-limit than simply policing, it can also be
configured to help prevent synchronisation. The question you asked does
not touch on this though, or on the other forms of shaping or policing.
Personally I took from your question that you wanted to know which of
the two answers best satisfied the requirements you set, rather than an
explanation of the various technologies.
It seems I misunderstood the purpose of your question and perhaps I'm
not the only one. People sometimes write questions with one thing in
mind and perhaps some of us understand them differently, nothing unusual
and no offence was intended I'm sure. The ambiguity may have been a
factor in that (as well as lack of coffee at this end). It could be the
case that ambiguity in Narbiks email caused what may have been a joke to
be interpreted otherwise, so I wouldn't take any offence there either.
Paul.
John wrote:
> Paul,
>
> It was purposly ambigious. I'm going through qos and some things are
> not quite clear. I understand there are various forms of rate-limiting
> one rate, two rate, two paint, treee paint etc. I'm also trying to pick
> up clues as to what a task is asking me ie "shape the average rate",
> "limit protocol to to xKbs", which are easy clues. I'm reading the
> config guide and various RFC's now, but that doesn't mean I won't get
> confused sometimes.
> ----- Original Message ----- From: "Paul Cosgrove"
> <paul.cosgrove@heanet.ie>
> To: "John" <jgarrison1@austin.rr.com>
> Cc: "Narbik Kocharians" <narbikk@gmail.com>; <ccielab@groupstudy.com>
> Sent: Monday, July 14, 2008 11:24 AM
> Subject: Re: Traffic shaping vs rate limit
>
>
>> Hi John,
>>
>> Shaping and policing are not the same beast. In addition there are a
>> number of policing methods to choose from, and they also operate
>> differently from each other.
>>
>> Your question does not include any information which suggests the use
>> of one over the other. Based on that you could use either, but the
>> question would normally indicate to you which to use.
>>
>> The doc cd has some good information explaining the differences in the
>> various commands.
>>
>> Paul.
>>
>>
>> John wrote:
>>> What a great point!!! Thanks for the help. Maybe one day I'll be
>>> able to
>>> point out peoples ignorance of a subject by calling their questions "
>>> ridiculous", instead of trying to clarify them. I guess that's
>>> easier than
>>> not replying.
>>>
>>> Again thanks
>>> ----- Original Message -----
>>> From: Narbik Kocharians
>>> To: John
>>> Cc: ccielab@groupstudy.com
>>> Sent: Monday, July 14, 2008 10:52 AM
>>> Subject: Re: Traffic shaping vs rate limit
>>>
>>>
>>> Some times these questions get ridiculous, its like saying answer the
>>> following questions:
>>>
>>>
>>>
>>>
>>>
>>>
>>> exactly, did you get it right?
>>>
>>>
>>> On Mon, Jul 14, 2008 at 9:09 AM, John <jgarrison1@austin.rr.com>
>>> wrote:
>>>
>>> Lets take a very ambigouis question. Make sure traffic on int x
>>> does not
>>> exceed 256k.
>>>
>>>
>>> Intx
>>>
>>> traffic shape rate 256000 32000 0
>>>
>>> VS
>>> intx
>>>
>>> rate-limit 256000 32000 32000 conform transmit exceed drop
>>>
>>> I'm pretty sure I'm missing something to me these are the same
>>>
>>>
>>>
>>> _______________________________________________________________________
>>> Subscription information may be found at:
>>> http://www.groupstudy.com/list/CCIELab.html
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> --
>>> Narbik Kocharians
>>> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
>>> www.MicronicsTraining
>>> www.Net-Workbooks.com
>>> Sr. Technical Instructor
>>>
>>>
>>> _______________________________________________________________________
>>> Subscription information may be found at:
>>> http://www.groupstudy.com/list/CCIELab.html
>>>
>>>
>>>
>>>
>>>
>>
>>
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