[rrg] Small v Large networks - 1 solution for both, 2 separate solutions etc.

[Lan Wang]

Bill,

I'm just responding to your following statement about APT, so I  
removed the other text.

On Oct 29, 2008, at 11:18 AM, William Herrin wrote:
>
>> Who said anything about removing BGP?  Certainly not me.  Not sure  
>> what you
>> mean by "disrupting."
>
> My understanding is that APT replaces BGP entirely within its islands
> from the outset, Ivip replaces BGP following a transition period and
> LISP retasks BGP to carry routing for only the core ingress and egress
> nodes. Apologies to the authors if I have that wrong; it has been a
> long time since I read any of the three proposals and I could easily
> be crosslinking other discussions in my head. Can you point me to
> documentation that clarifies the situation?
>
APT does not replace BGP.  In fact, BGP is still used by routers in  
ISPs to compute their routes to each other.   APT just defines how to  
distribute the mapping table among default mappers and how border  
routers communicate with the default mappers to obtain the mapping  
information.  The ITR still use BGP to figure out how to reach the  
ETR for the destination.

Lan