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RE: the cost of carrying routes

  • From: Charles Youse
  • Date: Mon Oct 14 17:20:37 2002

I think you're confusing commercial peering agreements with 
providing customers the ability to advertise their routes via BGP.

Two different issues.


-----Original Message-----
From: Jeff S Wheeler []
Sent: Monday, October 14, 2002 5:11 PM
Subject: Re: the cost of carrying routes


Many carriers require that you advertise a certain minimum number of
routes to them over your peering sessions, or they will not peer with
you.  This suggests that those carriers see routes carried as a point of
value, rather than or in addition to one of cost.  I have seen 5,000
routes as a minimum used by more than one transit-less carrier.

Is this really an operational value perception at these carriers, or is
it simply a means of creating a barrier-to-peering?  Are fewer, shorter
prefixes seen as more valuable than longer ones, e.g. swamp /24s?  Is a
University or other entity with a legacy /16 more or less valuable as a
peer than a growing ISP with a few /20s, and presumably more eyeballs
and/or content behind them?

Jeff S Wheeler <>

On Mon, 2002-10-14 at 16:47, Ron da Silva wrote:
> Do any ISPs charge based on the number of announcements a customer
> advertises?
> If downstream advertisements became mainly smaller prefixes (say /24)
> that were not aggregatable by you as their upstream ISP, would you
> answer the above question differently?

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