Re: [lisp] Map-Reply M bit?

[Margaret Wasserman <mrw at sandstorm.net>]

On Aug 31, 2009, at 8:53 PM, Dino Farinacci wrote:
> How about this:
>
>   M: this bit is reserved for use by the LISP mobile-node design
>      documented in [LISP-MN].
>
> Okay?

This doesn't seem like a good choice to me, because this bit is  
completely useless if mobile nodes (ones that implement LISP-MN) are  
the only ones that know about it.  In order for this bit to be useful  
to mobile nodes, the LISP xTRs at their (non-mobile) correspondent  
sites need to recognize this bit, and act differently when it is  
present.  Since we don't know, at this point, the specifics of what  
the remove LISP nodes should do when this bit is present, I think we  
should leave the bit undefined until we do.

If we discover, in our experiments, that there are things that non- 
mobile LISP nodes should do to work well with mobile LISP nodes, we  
can add the appropriate bit(s), if any, along with the description of  
what to do when they are present, to the main LISP draft at that time.

Margaret