Re: DSCP AF class

While we're on this topic, here's a good trick to convert these
Assured Forwarding class values to decimal (I saw it first in Wendel
Odom's QoS book):

AFxy
8 * x + 2 * y = decimal value

e.g.

AF22:
8 * 2 + 2 * 2 = 16 + 4 = decimal 20

AF41:
8 * 4 + 2 * 1 = 32 + 2 = decimal 34

cheers,
Dale

On Tue, Apr 21, 2009 at 11:23 PM, Jay Pal <jay.b.pal_at_gmail.com> wrote:
> ok. I am clear on the drop probability. what about the first numerical
> value. Does AF4 have preference over AF1?
>
> On Tue, Apr 21, 2009 at 9:19 PM, GAURAV MADAN <gauravmadan1177_at_gmail.com>wrote:
>
>> correct !
>>
>> first integer is "class selector" and second is " drop precedence"
>>
>> for drop prec : 1,2,3 .... 1 means low 2 means medium and 3 means high
>>
>> HTH
>> Gaurav Madan
>>
>> On Tue, Apr 21, 2009 at 6:43 PM, Jay Pal <jay.b.pal_at_gmail.com> wrote:
>>
>>> Actually, drop preference is the second numeric value in a particular
>>> class
>>> like AF11 (low drop), AF12 (medium drop) and AF13 (high drop).
>>>
>>> I was talking more on AF class (AF1, AF2, AF3 and AF4).
>>>
>>> On Tue, Apr 21, 2009 at 9:07 PM, Divin Mathew John <divinjohn_at_gmail.com
>>> >wrote:
>>>
>>> > AF1, AF2 etc... 1,2 is the drop preference. like AF1 will be dropped
>>> > less than AF2 and all
>>> > Thanking You
>>> >
>>> > Yours Sincerely
>>> >
>>> > Divin Mathew John
>>> > divinjohn_at_gmail.com
>>> > divin_at_dide3d.com
>>> > http://www.dide3d.com
>>> > +91 9945430983
>>> > +91 9846697191
>>> > +974 5008916
>>> > PGP PUBLIC KEY BLOCK @ http://www.dide3d.com/divin_Public_PGP_key.txt
>>> > Sent from Bangalore, KA, India
>>> >
>>> >
>>> > On Tue, Apr 21, 2009 at 6:31 PM, Jay Pal <jay.b.pal_at_gmail.com> wrote:
>>> > > Hi all,
>>> > >
>>> > > Just to make sure my understanding is correct on DSCP AF class. AF1,
>>> AF2,
>>> > > AF3 and AF4 have the same priority when using DSCP and there is no
>>> > > advantage of using AF4 to AF1 or AF2.
>>> > >
>>> > > If this is correct is there a way to make one of the AF class with
>>> more
>>> > > priority than other?
>>> > >
>>> > > thanks
>>> > > Jay
>>> > >
>>> > >
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>>> > >
>>> > >
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>
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Received on Tue Apr 21 2009 - 23:34:50 ART