The MPLS WG Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] [mpls] New Liaison Statement, "T-MPLS Consented Recommendatio ns"
> -----Original Message----- > From: George Swallow [mailto:swallow@cisco.com] > Sent: Tuesday, April 11, 2006 11:25 AM > To: neil.2.harrison@bt.com > Cc: mpls@lists.ietf.org; tnadeau@cisco.com > Subject: Re: [mpls] New Liaison Statement, "T-MPLS Consented > Recommendations" > > > Neil - > > > (i) I agree with you that some clarity is required on > > specific reserved label ranges and their uses. However, I'd > > say it's bigger than just the label ranges and should also > > include how all the header fields (ie S, EXP, TTL) are to be > > Could you enlighten us as to what you are considering here. Prima > facia, it would appear that you are diverting further from > MPLS than the > liaised material would indicate.... > > > used in T-MPLS (I noted you don't think this 'T-MPLS' name is > > good, but I'll stick with it here). Why? Well, folks need > > to consider the various client/server relationships that > > could exist between the various spins of MPLS as-is and > > T-MPLS....and especially misconnectivity between them....so > > how is this going to be handled? > > We handle such relationships for ATM, SONET, Ethernet without calling > any of those MPLS. I see no argument here for including MPLS in the > name of your transport technology. But none of them uses MPLS packet format: MPLS label, TTL, EXP, and switch based on the 20-bit label, and use EXP-bit to identify the CoS/DP, and use TTL for loop detection. MPLS, by Design, consists of two distinct planes: data-plane and control-plane. If the control-plane nails down only one specific path for an LSP, using say RSVP-TE, then there is no ECMP and merging. Additinally since PHP is optional, there is no mandate to support it. So are you saying a technology that uses MPLS data-plane, but its control-plane doesn't support ECMP, merging or PHP is not MPLS? -Shahram > > ...George > > ============================================================== > ========== > George Swallow Cisco Systems > (978) 936-1398 > 1414 Massachusetts Avenue > Boxborough, MA 01719 > > _______________________________________________ > mpls mailing list > mpls@lists.ietf.org > https://www1.ietf.org/mailman/listinfo/mpls > _______________________________________________ mpls mailing list mpls@lists.ietf.org https://www1.ietf.org/mailman/listinfo/mpls |
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