Re: [RRG] yetAnotherProposal: AS-number forwarding

[Ricardo Oliveira <rveloso@CS.UCLA.EDU>]

> Ricardo,
>
> What you said is just the first approach I mentioned in the  
> previous mail as
> follows:
> The first approach is to split the GIRO address into two parts: id and
> locator. In this approach, IPv4 address part in GIRO address is  
> used as id,
> which means there is no need to change the hosts however it doesn't  
> address
> the IPv4 address depletion issue and it introduces a new locator space
> compared to LISP/eFIT.
>
> What's the benefit of introducing a new locator namespace compared  
> with
> LISP/eFIT which reuses IP address as locator?  Once the id/loc  
> split idea is
> introduced, the locator can be allocated in a hierarchical way even  
> though
> we still use IPv4/v6 as locator.
Xiaohu:
The main advantage of using the ASN+location+SID namespace is to  
enable both topological and geographical aggregation, and help in   
reducing route geographical stretch.
Note that GIRO is *not* a loc/id separation solution, but just a  
different way of organizing the bits in the address and announcing in  
BGP only the relevant bits for inter-domain routing. The 2nd half of  
GIRO address is also a locator to route pkts inside the dest ASN.  
This means that all mapping can be easily done trough DNS by querying  
the  dest host name to get the full GIRO address, in the same way  
hosts are looked up in current Internet.

--Ricardo

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