> > => you mix up router lifetime (which is in fact the 
> lifetime as a default
> > router) and prefix lifetimes (which are the lifetimes of 
> the prefix).
> > The router is removed from the default router list when 
> *its* lifetime
> > is expired, this should have no effect on the prefix list.
> 
> Actually, I had the misunderstanding that RA prefix option with L=0
> and A=0 was a useful way for router to inform, that it is willing to
> route the matching addresses. I though this was a nice feature...
> 
> So, if I see prefix option with L=0 and A=0, it should be totally
> ignored? (and not give the useful semantics to it?).

Yes, your processing of a prefix option should be based on which flag
bits are enabled. If all the flag bits are off, then the prefix option
is totally ignored.

See draft-draves-ipngwg-router-selection-00 for the functionality you
were thinking about.

Rich
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