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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
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