North American Network Operators Group|
Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical
Re: wiretapping continues....
>> John Scudder then discussed some modeling he and Sue Hares have done >> on the projected load at the NAPs. The basic conclusions are that the >> FDDI technology (at Sprint) will be saturated sometime next year... >MarkFedor/ColeLibby from PSI said there was a "quiet" admission that the old >methodology was already "approved" for the SPRINT NAP. This technology works *now* (Sprint NAP is already in production use) and there is a clear path for upgrading it to practically unlimited aggregate bandwidths: 1) replace FDDI concentrators with FDDI switch (this gives us up to 1Gbps of total bandwidth while limiting access to one full DS-3) 2) replace single FDDI with multiple FDDIs (realistically with 2 or 3) -- allowing access at OC-3 speeds 3) build point-to-point bypasses between peers with OC-3s or FDDI to take the traffic out of shared medium. We will hit limitations of the present/then-future routing technology long before we'll exhaust the possibilities to increase the NAP aggregate and access bandwidth by cheap incremental upgrades. That's the whole point of Sprint NAP architecture. ATM/SMDS/Flame Delay do not get even close to what we achieve (and ATM is not useful yet). Load balancing between NAPs is necessary, but for entirely different reasons -- first, because of capacity limitation on nation-wide backbones and, second, to reduce latencies on cross-ISP traffic. --vadim - - - - - - - - - - - - - - - - -