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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Exchanges that matter...
On Sun, 8 Dec 1996, Stephen Stuart wrote: > > At the Atlanta-NAP we offer full duplex FDDI, why not try to get MFS to do > > it? Cisco now has a full duplex FDDI card, so you can do 200 Mbs into the > > NAP. > > Every NAP with a GIGAswitch/FDDI offers full duplex FDDI; the MAEs, > Sprint, PAIX, and you. Buy a full-duplex-capable card, install it, and > you get full duplex. You, the NAP operator, do nothing; the devices > negotiate in and out of full duplex mode themselves. Ah, if I have a FDDI connection into MAE-East I cant do full duplex unless they enable it, it now is disabled. > I'm somewhat confused as to why you would say you offer full duplex > FDDI in a manner that implies no-one else does. If someone walked up > to your GIGAswitch/FDDI (or anyone's) with a full duplex line card, > they'd get full duplex unless you took some specific action to prevent > it (by, say, putting three stations on a ring), or if you disable it > in management (it comes enabled by default). Well, because when I talked to MFS they said they would don't turn on full duplex modem, I got the same thing from PAIX. > >From Chapter 1 of the Big Book of GIGAswitch/FDDI (June 1993): > > "Point-to-point links can operate in a full-duplex mode to increase > bandwidth and reduce latency. Using FDDI, simultaneous transmission > and reception in a point-to-point connection between two FDDI adapters > that support full-duplex communication can provide twice the raw > bandwidth of the data link. When a point-to-point link is created with > a station that can use full-duplex mode, the communication mode is > changed from token ring to full-duplex. No token is passed in > full-duplex mode. Configurations can automatically move in and out of > full-duplex mode as the opportunity (two stations on a ring, both > capable) becomes available, or unavailable. Full-duplex mode can be > disabled using MIB objects in version 2.7 of the DEC Vendor MIB." > > Since you point it out as a specific offering, does that mean you turn > it off by default? Do you charge more for it? No, I turn it on, so far all the NAPs I have turned it off. If MFS and PAIX wants to turn it on then great. Nathan Stratton CEO, NetRail, Inc. Tracking the future today! --------------------------------------------------------------------------- Phone (703)524-4800 NetRail, Inc. Fax (703)534-5033 2007 N. 15 St. Suite 5 Email [email protected] Arlington, Va. 22201 WWW http://www.netrail.net/ --------------------------------------------------------------------------- "Therefore do not worry about tomorrow, for tomorrow will worry about itself. Each day has enough trouble of its own." Matthew 6:34 - - - - - - - - - - - - - - - - -
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