Re: Shim6 vs PI addressing

[David Barak <thegameiam () yahoo com>]

--- Jared Mauch <jared () puck nether net> wrote:
>       I think you're missing that some people do odd
> things with their IPs as well, like have one ASN and
> 35
> different sites where they connect to their upstream
> Tier69.net
> all with the same ASN.  This means that their 35
> offices/sites
> will each need a /32, not one per the entire asn in
> the table.

No, that's an argument for a /32 and a bunch of /48
allocations heard by a single provider, who's getting
paid to carry them, but are not advertised to the rest
of the Internet.

>       And they may use different carriers in different
> cities.  Obviously this doesn't fit the definition
> that some have
> of "autonomous system", as these are 35 different
> discrete networks
> that share a globally unique identifier of sorts.

Well, wait a minute - what would these people do
TODAY?  Some build tunnel backbones, some use one ASN
per city, some do "allowas-in" or other things of that
nature.  I would venture to say that most medium to
large enterprises don't use straight-Internet with no
VPN of any kind to support their enterprise backbones
anymore, simply for security reasons.  

My argument still stands - if having an ASN is equated
with having a routable netblock, then each of those
cases results in the enterprise being able to pass
packets, and only the "one ASN per city" approach
requires multiple netblocks.

-David

David Barak
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