Re: 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: [email protected] [mailto:[email protected]] On
Behalf Of Jiang Yuan-long
	Sent: 18 August 2009 14:01
	To: [email protected]
	Cc: [email protected]
	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

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