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Re: wiretapping continues....
- From: Vadim Antonov
- Date: Thu Oct 27 14:43:44 1994
>> 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
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
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.
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