Shim6 vs PI addressing

David Barak thegameiam at yahoo.com
Fri Mar 3 02:54:31 UTC 2006



--- Jared Mauch <jared at 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
Need Geek Rock?  Try The Franchise: 
http://www.listentothefranchise.com

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 



More information about the NANOG mailing list