Re: [Diffserv] [OFFLIST] MPLS+Diffserv(mapping DSCP to EXP)
Mark Duffy <mduffy@quarrytech.com> Tue, 04 February 2003 12:38 UTC
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Date: Tue, 04 Feb 2003 07:29:20 -0500
To: nerdboy@rediffmail.com, Diffserv@ietf.org
From: Mark Duffy <mduffy@quarrytech.com>
Subject: Re: [Diffserv] [OFFLIST] MPLS+Diffserv(mapping DSCP to EXP)
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Have a look at <http://www.ietf.cnri.reston.va.us/rfc/rfc3270.txt> At 11:50 AM 2/4/2003 +0530, nerdboy wrote: >Hi, > >i know this is offtopic but i didnt know where else to ask. > >i understand that the EXP bits in MPLS are used to provide DSCP >functionality(Diffserv) for EXp inferred LSP's in MPLS. > >1. i want to know how the DSCP bits are mapped to the EXP bits ? > >2. Further, since the DSCP ( pow(2,8) = 256 combinations ) is 8 bits and >provides 22 different PHB's(or roughly 7 different classes), > and the EXP is just 3 bits and therefore can provide only upto 8 >different classes, wouldnt there be loss of info while mapping DSCP->EXP ? > >any help would be greatly appreciated. > >Warm Regards >nerd >_______________________________________________ >diffserv mailing list >diffserv@ietf.org >https://www1.ietf.org/mailman/listinfo/diffserv >Archive: >http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html _______________________________________________ diffserv mailing list diffserv@ietf.org https://www1.ietf.org/mailman/listinfo/diffserv Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html