Re: [Air-l] Re: Data
elijah wrote:
regular old ISPs do exactly the same thing - to some extent, the university is just another ISP which can peer with whatever will lower its total costs for bandwidth and data line leases.
Indeed. The internet is essentially a group of islands (Autonomous Systems) and the way that packets move about is by hopping form island to island. A Peering arrangement is effectively a bridge between two islands in (almost) exactly the same way a Transit arrangement is – the difference being that in Peering the traffic is roughly the same in both directions so money does not change hands, whereas in Transit the bigger player sells to the smaller one. So hand- off to a peer reduces overall cost. Though I’m not sure it impacts data line lease as the traffic from people’s computers to ‘the net’ i.e. the peering point, is the same. Peering does effect network topology as packets generally like to take the lest number of hops – in many cases the shorted route will be via the most connected island i.e. the most peered network, so flow will go along these lines and you will see big peaks at major connection points e.g. MAE West - this does not really impact the original question (on the source side) as data still comes from someone’s computer that is geographically sat somewhere, it does impact destinations, as these are predominantly hosting centres which tend to be clustered around interconnection points. Ren ---- Original message ----
Date: Tue, 25 May 2004 21:00:12 -0500 (CDT) From: elijah wright <elw@stderr.org> Subject: Re: [Air-l] Re: Data To: air-l@aoir.org
Ok, not to jump in with an irrelevant conversation, but when I talked to a former CIO of a big university, he pointed out that the strength of internet-2 was in peering, that the biggest uni's who join the I2 network will be factoring in a peering factor when their universities are charged for internet access.
regular old ISPs do exactly the same thing - to some extent, the university is just another ISP which can peer with whatever will lower its total costs for bandwidth and data line leases.
elijah
So hypothetical only, charges would disappear and couldn't be tracked, although traffic would of course not disappear (isn't that the truth).
Denise
_______________________________________________ Air-l mailing list Air-l@aoir.org http://www.aoir.org/mailman/listinfo/air-l
Transit the bigger player sells to the smaller one. So hand- off to a peer reduces overall cost. Though I’m not sure it impacts data line lease as the traffic from people’s computers to ‘the net’ i.e. the peering point, is the same.
this happened a little more often when lines were more expensive - in many cases, ISPs (including one i worked for briefly in the mid-90s) would carefully choose their peers in order to minimize the amount of money being paid out to the telco in 'rent' for the trunk lines between the ISP and the neighboring peers. such an action was saving between 7 and 10,000 dollars a month - not a lot in the grand scheme of things, but a ton of cash for a mom-and-pop small ISP. elijah
Elijah
'rent' for the trunk lines between the ISP and the neighboring peers.
Ah, yes, I was thinking purely in terms of logical connectivity in data rooms (Telco Jails as I heard it called in an ISP meeting today) and over WANs on the one hand and a single or n+1 tail circuit from the ISPs main location. Carefully choosing geographically closer peers would indeed reduce tail prices as this are mainly a factor of distance (well outside metros). Good point, sorry. Ren -----Original Message----- From: air-l-admin@aoir.org [mailto:air-l-admin@aoir.org] On Behalf Of elijah wright Sent: 26 May 2004 17:44 To: air-l@aoir.org Subject: Re: [Air-l] Re: Data
Transit the bigger player sells to the smaller one. So hand- off to a peer reduces overall cost. Though I'm not sure it impacts data line lease as the traffic from people's computers to 'the net' i.e. the peering point, is the same.
this happened a little more often when lines were more expensive - in many cases, ISPs (including one i worked for briefly in the mid-90s) would carefully choose their peers in order to minimize the amount of money being paid out to the telco in 'rent' for the trunk lines between the ISP and the neighboring peers. such an action was saving between 7 and 10,000 dollars a month - not a lot in the grand scheme of things, but a ton of cash for a mom-and-pop small ISP. elijah _______________________________________________ Air-l mailing list Air-l@aoir.org http://www.aoir.org/mailman/listinfo/air-l
participants (3)
-
elijah wright -
Ren Reynolds -
ren＠aldermangroup.com