Re: Af Clasess

This should help.

http://www.cisco.com/en/US/tech/tk543/tk757/technologies_tech_note09186a00800949f2.shtml

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Mark Snow
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On Oct 22, 2009, at 19:23, "Routt, Rob" <Rob.Routt_at_itron.com> wrote:
> Are they just wanting you to understand that AF32 has a higher drop
> probability than say AF31 and just using AF21 to throw you off? My
> understanding is the reason for AFx1,AFx2, and AFx3 is to establish  
> that
> drop probability since the COS/IP Prec value is 3 in this case; and  
> only
> have to do with classification and marking. (from the left)Bits 2  
> and 1
> decide the drop probability and bit 0 is always 0.  I don't think it  
> has
> anything to do with differing precedence levels; so in my opinion, the
> answer is correct. Another way to look at it is this:
>
> Does AF33 have a higher drop probability than AF31? If so, what bits
> decided this? I don't believe it to be the first three. I surely could
> be wrong, but that is how I understand it to work.
>
> Hth,
>
> -Rob
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf  
> Of
> Divin Mathew John
> Sent: Thursday, October 22, 2009 4:02 PM
> To: Martin Hogan
> Cc: Joseph L. Brunner; Cisco certification
> Subject: Re: Af Clasess
>
> AF21 = 010 010
> AF32=  011 100
>
> Drop probabily in AF21 is 1 and drop probability in AF 32 is 2. now in
> drop probability HIGHER VALUES are susceptible to more DROPS. hence
> AF32 has a "HIGHER" Drop probability! atleast thats wht INE has
> mentioned as the answer.!  yet to hear from them!
>
>
> On Fri, Oct 23, 2009 at 4:25 AM, Martin Hogan
> <martin.john.hogan_at_gmail.com> wrote:
>> Can you elaborate?
>>
>> On Friday, October 23, 2009, Divin Mathew John <divinjohn_at_gmail.com>
> wrote:
>>> its actually a question from OEQ Simulator from INE!  they say the
>>> answer is AF32. which would be correct if they are only taking into
>>> account the DROP probabily ie . bits 4,5 in 8bits!
>>>
>>> On Fri, Oct 23, 2009 at 3:54 AM, Joseph L. Brunner
>>> <joe_at_affirmedsystems.com> wrote:
>>>> "Per Hop Behavior"... you tell me you're configuring the router...
>>>> JK ROFL
>>>>
>>>> No any CS3 should be less likely to drop that CS2 (as any CS4  
>>>> should
>
>>>> be higher than 3 or 2)
>>>>
>>>> -Joe
>>>>
>>>> -----Original Message-----
>>>> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On  
>>>> Behalf
>
>>>> Of Divin Mathew John
>>>> Sent: Thursday, October 22, 2009 6:13 PM
>>>> To: Cisco certification
>>>> Subject: Af Clasess
>>>>
>>>> Which class has a Higher Drop Probability?
>>>>
>>>> AF21 or AF32?
>>>>
>>>> AF21 = 010 010
>>>> AF32=  011 100
>>>>
>>>>
>>>> --
>>>>
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>>>
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>>
>
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