> On Jul 28, 2014, at 9:52 PM, Marc Binderberger <[email protected]> wrote:
> 
> Hello Dino,
> 
> thanks for this comment - that's an interesting point of view.
> 
> Hmm, how do the O (or RA in another draft) and the P bit fit into this 

O-bit in LISP is not needed. I told the LUSP-GPE authors this. Because 
OAM-packets like all other control packets go in UDP port 4342 (where 
encapsulated packets go in UDP port 4341). 

And P-bit is not needed and the authors indicated the main motivation was to 
keep consistent with VXLAN so same hardware design could do both. LISP already 
has port 8473 for L2 frames. And NSH is a service protocol and should run above 
the transport layer so should have its own port and can address packets 
anywhere. Just like any other UDP application. If that packet needs to be 
encapsulated that is a lower level function. Just like IP packets can go in an 
MPLS based LSP. 

> picture?  They do mean something about how the packet is handled, don't they?

I won't answer that because those bit introductions into the design are indeed 
design bugs IMO. 

Dino
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