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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Attempt to summarize Links on the Blink
> I would like to try to understand better where this discussion seems to > have come to rest. Yesterday the suggestion was made that the major > providers add more bandwidth to their backbones. There seemed to be no > assertion as to how this could be done. > > 1. OC-3 is not yet routable on backbones. Is that correct? Well, I was told that the Cisco AIP card can talk point-to-point to another AIP card at OC-3 speed using either HDLC or PPP. > 2. What is the routing impact of parrallel T-3s? Or the creation of a > mesh of T-3s? I have the impression that this is not feasible because it > would expand the routing tables unacceptably or because of the questions > of how you would load balance among them?? If data can be routed on parallel T3s on a per-connection basis so that there isn't a scrambling of ordering of packets per connection, then some benefit is achived, though no single application or site can use more than a T3 of bandwidth. > 3. There seems to be some consensus that we will see an increase in the > numbers of NAP or MAE like interchange points which could cut down on the > traffic that must traverse long haul backbones. *BUT* doesn't each > additional interchange point used by all the top level providers mean > another new set of global routes crowding router memories? It depends. If routing decisions are made locally and the routes heard at smaller or private exchange points by NSP x are not distributed to NSP x's larger peering/route-decision routers, then possibly no. That would mean only hearing routes at private exchange points that were also heard elsewhere (at a major peering point). > 4. How much help will regional NAPs like Tucson be? Their goal is to > keep local traffic local and off long haul backbones. What liklihood is > there that these will grow in numbers quickly enough to make a > difference? If the majors start showing up at these points does their > arrival mean that the problem of crowding memory in their backbone > routers will be increased? See above. Avi
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