T1 vs. T2 [WAS: Apology: [Tier-2 reachability and multihoming]]

bmanning at vacation.karoshi.com bmanning at vacation.karoshi.com
Tue Mar 29 02:46:28 UTC 2005


On Mon, Mar 28, 2005 at 09:15:53PM -0500, Patrick W Gilmore wrote:
> 
> On Mar 28, 2005, at 8:29 PM, bmanning at vacation.karoshi.com wrote:
> 
> >>and if you peer with all networks in the 'transit free zone' then you 
> >>too become
> >>transit free also.
> >
> >	er.. hate to rain on your parade but if I peer with everyone
> >	i need/want to exchange traffic with, i am transit-free, even
> >	if I -NEVER- touch any other part of the commercial Internet...
> >	my packets get to where they need to go and all packets I want
> >	get to me.  my life is good ... even if I only appear as vestigal
> >	to the commercial Internet, if I appear at all.
> 
> Absolutely correct.
> 
> 
> >	how would you classify such a network?  T1, T2, ODDBALL-0,
> >	non-Internet-265, ???
> 
> I doubt it is a tier.  I am certain it is not an "Internet" network if 
> it does not have connectivity to substantially all other Internet 
> networks.

	begs the definition of "internet networks" ... 
	It has IP connectivity to the other IP networks of interest.
	For networks that are not of interest, there is no expressly
	defined connectivity.  The term Internet has devolved into 
	a series of interconnected -COMMERCIAL- networks and from that
	viewpoint, anyone on a non-commercial network, that has no desire
	to be connected to a commercial network, is relegated, BY THE
	COMMERCIAL OPERATORS, to "intranet" status.  The historical 
	term  - INTERNET - reflected a catanet of networks that used IP
	for packet delivery.  with the inclusion of robust policy expression
	on network "edges" - full, global, end2end reachability truely
	became a myth ...  and the term Internet became based on a 
	shifting foundation.  So from a commercial networking perspective,
	yes, my network is vestigal.  But it is transit-free and has
	full connectivity to all of the parties it wants/needs to talk to.
	So by that definition (e.g. transit-free) its a Tier-1.  
	Sort of points out some of the weaknesses in terminology and 
	the biases in a single viewpoint.

	as usual, YMMV.

--bill

> TTFN,
> patrick



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