dscp af classes

Unanswered Question
Dec 17th, 2008

Hi all, when talking about dscp AF, why are there 4 classes, and which gives the lowest drop precedence, why not have 1 class with more drop precendences?



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Joseph W. Doherty Wed, 12/17/2008 - 09:58

"why are there 4 classes"

That's unclear from the defining RFC2597. My guess would be it was a good fit into the DSCP RFC2474 with minimum conflict to the earlier IP Precedence.

"which gives the lowest drop precedence"

AFx1, per RFC2597

"why not have 1 class with more drop precendences"

My guess would be to best conform with prior IP Precedence and especially with DSCP, RFC2474.


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