[RAM] Re: the separation of ID/RLOC

[Dino Farinacci <dino at cisco.com>]

> As I spot, in LISP1, LISP1.5, there is no a complete separation  
> bwtween ID/RLOC , because, within a site, a EID still play both  
> roles at the same time, in LISP2 & LISP3, EIDs are said to be  
> unroutable, I do not really understand, here I guess that you mean  
> EIDs are not routable among ISPs, like Tier-1 etc, they are still  
> routable inside a site. If I am wrong, how devices inside a site  
> can be routed?

The ID/RLOC split is for global communication. Which means outside of  
the site. So yes, an EID is routeable within a site and there is no  
split because the packet hasn't hit an ITR yet. When the packet  
reaches an ITR, the packet is typically destined for a destination  
outside of the site. At that point the ITR prepends a header where  
the addresses in the outer header are RLOCs.

Dino

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