Re: DSCP bit values in OEQ... really????

IP Prec = 3 bits, DSCP = 6 bits, TOS = 8 bits.
IPP of 5=DSCP of 40 = TOS of 160. Similarly, DSCP of EF(46)= TOS of 184

On Mon, Sep 14, 2009 at 4:22 PM, Joseph L. Brunner
<joe_at_affirmedsystems.com>wrote:

> Correct but I would also learn the way back from DSCP 22 to AF23... it's
> just a likely you could be asked to provide the AF code for 010110,etc
>
> And be stuck
>
> 4 2 1 PREC BITS 2 1 0 Drop Prefs.
> 0 1 0 (CS2) 1 1 0 High drop
>
> -Joe
>
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Joe Astorino
> Sent: Monday, September 14, 2009 4:12 PM
> To: Ronald Johns
> Cc: ccielab_at_groupstudy.com
> Subject: Re: DSCP bit values in OEQ... really????
>
> Well EF = DSCP 46 is a pretty well known value. Generally, in the ask the
> expert forum it was stated that the point is not memorization type
> questions, but honestly at this point who knows? An easy way to remember
> this is with the following formula:
>
> AFxy = DSCP 8x + 2y
>
> So AF23 for instance = (8*2) + (2*3) = DSCP 22
>
> On Mon, Sep 14, 2009 at 4:00 PM, Ronald Johns <rj686b_at_att.com> wrote:
>
> > Do I really need to memorize bit values for DSCP? (e.g. EF, AF11, etc.) I
> > was
> > working through a sim and came across a question asking for the 6 left
> most
> > bits in the TOS field with a DSCP value of EF... If so, is there an easy
> > way
> > to memorize these?
> >
> > Thanks,
> >
> > Ron Johns
> > Sr. Network Engineer
> > IT Department
> > CCNP, CCDP, CCSP, CISSP
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>
> --
> Regards,
>
> Joe Astorino - CCIE #24347 R&S
> Technical Instructor - IPexpert, Inc.
> Cell: +1.586.212.6107
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Received on Mon Sep 14 2009 - 16:26:15 ART