Re: [L2tpext] RE： [mpls-tp] Section 3.4.1 of the MPLS TP Framework I-D - Nee RE: [PWE3] An error in RFC 4446"IANA Allocations for PseudowireEdge to Edge Emulation (PWE3)"

[Jiang Yuan-long <[e-mail]>]

Hi Liu,

Mapping our discussion topic to the nomenclature of this draft, it is:
Can this service label be a PW label when the payload is IP?

Thanks,
Yuanlong
  ----- Original Message ----- 
  From: [e-mail] 
  To: Drake, John E 
  Cc: [e-mail] ; Yong Lucy ; [e-mail] ; [e-mail] ; [e-mail] ; [e-mail] ; Jiang Yuan-long 
  Sent: Thursday, August 20, 2009 9:53 AM
  Subject: RE： [mpls-tp] Section 3.4.1 of the MPLS TP Framework I-D - Nee RE: [PWE3] An error in RFC 4446"IANA Allocations for PseudowireEdge to Edge Emulation (PWE3)"



  hi,all 
  I reviewed section 3.4.1 in draft-ieft-mpls-tp-framework-02, for all cient services, there is a unite service label(s=1) to identify procotol payload type, and The mapping between protocol payload type and Service Label is either configured or signaled. 
  if this section will not changed in the future. I think that it is unnecessary to continue to disscuss the topic. 

  how about all? 

  best regards 
  liu

        




        "Drake, John E" <[e-mail]> 
        发件人:  [e-mail] 
        2009-08-20 04:31 
       收件人 "Yong Lucy" <[e-mail]>, "Jiang Yuan-long" <[e-mail]>, <[e-mail]>, <[e-mail]>  
              抄送 [e-mail], [e-mail]  
              主题 [mpls-tp] Section 3.4.1 of the MPLS TP Framework I-D - Nee RE:        [PWE3] An error in RFC 4446"IANA Allocations        for        PseudowireEdge to Edge Emulation (PWE3)" 

              

        ie 



  Lucy,

  I'm sorry but I don't understand your conclusion.  I think your
  penultimate sentence is correct but I don't understand its relevance,
  and your last sentence appears to have precipitated a layer inversion.

  Section 3.4.1 deals with client network layer payloads, where 'network
  layer' is defined in RFC 3031 to be "synonymous with layer 3".

  Thanks,

  John  

  > -----Original Message-----
  > From: Yong Lucy [mailto:[e-mail]] 
  > Sent: Wednesday, August 19, 2009 12:44 PM
  > To: Drake, John E; 'Jiang Yuan-long'; [e-mail]; 
  > [e-mail]
  > Cc: [e-mail]
  > Subject: RE: [PWE3] An error in RFC 4446"IANA Allocations for 
  > PseudowireEdge to Edge Emulation (PWE3)"
  > 
  > Hi John,
  > 
  > One clarification on this:
  > 
  > When client network layer over MPLS-TP LSP directly, the 
  > method implies that client network layer can use this MPLS-TP 
  > LSP as a client network link because the LSP is a 
  > bidirectional point to point connection. When client traffic 
  > over a PW, the PW does not guarantee link characteristics.
  > Therefore, the method only applies to client non-network layer.
  > 
  > Is my understanding correct? 
  > 
  > Regards,
  > Lucy
  > 
  >  
  > 
  > > -----Original Message-----
  > > From: [e-mail] [mailto:[e-mail]] 
  > On Behalf 
  > > Of Drake, John E
  > > Sent: Wednesday, August 19, 2009 8:09 AM
  > > To: Jiang Yuan-long; [e-mail]; [e-mail]
  > > Cc: [e-mail]
  > > Subject: Re: [PWE3] An error in RFC 4446 "IANA Allocations for 
  > > PseudowireEdge to Edge Emulation (PWE3)"
  > > 
  > > Yuanlong Jiang,
  > > 
  > > Please see section 3.4.1 of the MPLS TP Framework I-D:
  > > 
  > > http://www.ietf.org/id/draft-ietf-mpls-tp-framework-02.txt
  > > 
  > > It describes how client network layer payloads (e.g., IP 
  > and MPLS) are 
  > > carried directly, i.e., without a pseudo-wire, over an MPLS 
  > TP server 
  > > network.
  > > 
  > > Client non-network layer payloads still use pseudo-wires.
  > > 
  > > Thanks,
  > > 
  > > John
  > > 
  > > > -----Original Message-----
  > > > From: Jiang Yuan-long [mailto:[e-mail]]
  > > > Sent: Tuesday, August 18, 2009 7:21 PM
  > > > To: [e-mail]; [e-mail]
  > > > Cc: [e-mail]
  > > > Subject: Re: [PWE3] An error in RFC 4446 "IANA Allocations for 
  > > > PseudowireEdge to Edge Emulation (PWE3)"
  > > >
  > > > Neil,
  > > >
  > > > Thank you for your reply.
  > > > As Himanshu said in the last email, 0x000B is actually 
  > the PW type 
  > > > for IP, rather than L2TP PW type for IP. So I believe it is also 
  > > > feasible for MPLS-TP.
  > > >
  > > > I agree with you that there is some difficulty for MPLS 
  > label stack 
  > > > to operate in the same manner as client/server layering 
  > model, but 
  > > > an adaptation layer such as PW functions now is indispensable.
  > > >
  > > >  Best Regards
  > > > Yuanlong Jiang
  > > >
  > > >
  > > >
  > > >
  > > >
  > > >                  ----- Original Message -----
  > > >                  From: [e-mail]
  > > >                  To: [e-mail] ; [e-mail]
  > > >                  Cc: [e-mail]
  > > >                  Sent: Wednesday, August 19, 2009 4:16 AM
  > > >                  Subject: RE: [PWE3] An error in RFC 4446 "IANA Allocations for 
  > > > Pseudowire Edge to Edge Emulation (PWE3)"
  > > >
  > > >                  Hi Yuanlong Jiang,
  > > >
  > > >                  Where you said below:
  > > >                  "I also wonder whether we should define a PW type for 
  > IP payload so 
  > > > that everything on PW is possible"
  > > >
  > > >                  This is precisely what a key consequence of MPLS-TP is, 
  > ie in the 
  > > > LDP spin of MPLS we had to define PWs (one reason being that LDP 
  > > > requires that IP traffic units can run native in the DP with MPLS 
  > > > traffic units), but given we can't have IP in the MPLS-TP 
  > DP and we 
  > > > can't have LDP mp2p merging constructs in MPLS-TP anyway 
  > (the latter 
  > > > point is all about resource management determinism) then the 
  > > > original driver for PWs is gone.....just a fact.  So now 
  > everything 
  > > > is a PW and nothing is a PW....that is, we just have 
  > clients (any) 
  > > > of MPLS-TP.
  > > >
  > > >                  We still have a tricky issue with the S bit that is not fully 
  > > > understood IMO yet (S bit => sublayering, as opposed to true 
  > > > client/server layering), which is also related to the important 
  > > > topic of being able to do MPLSoverMPLS as a proper client/server 
  > > > relationship.
  > > >
  > > >                  So what you point out below will be the case in MPLS-TP anyway 
  > > > (though I'm not sure everyone is comfortable with the 
  > acceptance of 
  > > > this fact yet)
  > > >
  > > >                  regards, Neil
  > > >
  > > >
  > > >
  > > > ________________________________
  > > >
  > > >                                   From: [e-mail]
  > > > [mailto:[e-mail]] On Behalf Of Jiang Yuan-long
  > > >                                   Sent: 18 August 2009 14:01
  > > >                                   To: [e-mail]
  > > >                                   Cc: [e-mail]
  > > >                                   Subject: [PWE3] An error in RFC 4446 "IANA 
  > Allocations for 
  > > > Pseudowire Edge to Edge Emulation (PWE3)"
  > > >
  > > >
  > > >                                   Hi, all:
  > > >
  > > >                                   I came accross an error in RFC 4446 "IANA 
  > Allocations for 
  > > > Pseudowire
  > > >                                   Edge to Edge Emulation (PWE3)".
  > > >
  > > >                                   In Sec 3.2, it says:
  > > >                                   "   0x000B  IP Layer2 Transport
  > > >              [RFC3032]"
  > > >
  > > >                                   it should be:
  > > >                                      0x000B  IP Layer2 Transport
  > > >       [draft-ietf-l2tpext-pwe3-ip]
  > > >
  > > >                                   The same problem also exists in web page version 
  > > > http://www.iana.org/assignments/pwe3-parameters
  > > > <http://www.iana.org/assignments/pwe3-parameters> .
  > > >
  > > >                                   I wonder how about the status of this expired 
  > WG draft, will any 
  > > > more work
  > > >                                   continue on this document or just expired as it is?
  > > >                                   I also wonder whether we should define a PW 
  > type for IP payload so 
  > > > that
  > > >                                   everything on PW is possible.
  > > >                                   Any comments?
  > > >
  > > >                                      Thanks,
  > > >                                   Yuanlong Jiang
  > > >
  > > >
  > > >
  > > _______________________________________________
  > > pwe3 mailing list
  > > [e-mail]
  > > https://www.ietf.org/mailman/listinfo/pwe3
  > 
  > 
  > 
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