>  There then remains the question as to whether the “Area Prefix” is anycast 
> or unicast i.e., is it common to all IERs or is it unique to whomever gets 
> elected Area Leader?
> Does it matter? We have no clear semantics for this prefix. A difference that 
> makes no difference is no difference.
> [Les:] This question needs to be directed at those who prefer the Area Prefix 
> approach. It matters as it impacts configuration and advertisement semantics. 
> An anycast prefix is NOT a Node Prefix.
> And it impacts how traffic is forwarded into the area.
> How so?  Traffic will be directed to the SID value (modulo PHP). 
> [Les3:] If the prefix is private to a single router then traffic has to pass 
> through that router. If it is anycast the traffic could arrive at any one of 
> the routers supporting the anycast address.

I must be missing something. My understanding of SR is that you forward based 
on the label.  Please educate me.


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