The MPLS WG Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] [mpls] what routing protocols have what to do with QoS?
At 2:48 PM -0800 11/13/04, Yakov Rekhter wrote: >Kireeti, > >> On Thu, 11 Nov 2004, SP wrote: >> >> > since MPLS over ip over ethernet... >> > and since ip over ethernet (layer 3 over layer 2)... >> >> Let MPLS be Layer N. >> >> By the above, N > 3. >> >> You can also carry Ethernet over MPLS, >> >> Hence, 2 > N. >> >> Therefore, 2 > 3. QED. >> >> Hope that helps :-) > >Just to help more, here are few points from one of my presentations >on (G)MPLS: > >(G)MPLS is not a Network Layer on its own, as it does not have routing >and addressing on its own - it uses IP addressing + IP routing (with >extensions) > >(G)MPLS is not a Link Layer because MPLS works over various Link Layer >technologies (e.g., SONET, Ethernet, ATM, etc.) > >(G)MPLS is not a Layer in the OSIRM (OSI Reference Model) sense as it >does not have a single format for transport of the data from the >layer above (e.g., (G)MPLS uses "shim" on SONET, VCI/VPI on ATM, time >slot on TDM, lambda on OXC, etc...). > >Yakov. To be excessively pedantic, could (G)MPLS not be either a subnetwork access protocol, or perhaps even a control plane for subnetwork access, under the OSI Internal Organization of the Network Layer definition? _______________________________________________ mpls mailing list mpls@lists.ietf.org https://www1.ietf.org/mailman/listinfo/mpls
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