North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: 10 gige experience
On Thu, May 10, 2001 at 11:12:21AM -0400, Greg Maxwell wrote: > > On Thu, 10 May 2001, John Fraizer wrote: > > > > Anyone know any good articles on 10GB ethernet? I am specifically > > > intrested if they have removed some of the legacy requirements that > > > hamper gigabit ethernet (such as a default MTU of 1500, half-duplex, > > > etc.) > > > > Half-duplex? The last time I checked, my GigE equipment didn't default > > to half-duplex. > > No I wouldn't expect it to, nor did I state anything about defaulting > to half. There is no purpose for half-duplex in GIGE, even the few > GIGE hubs I've seen are buffered and user congestion control to allow > full duplex operation. The possibility of half-duplex mode just adds > unneeded cruft and additional failure modes. If it didn't support half-duplex, it wouldn't technically be 802.3 ethernet. Full duplex is what happens when you remove CSMA/CD. I'm sure 99% of people out there have absolutily no need or desire for half duplex gige or 10gige, and I'm also sure 99% of people out there would be far better served by a larger MTU. Unfortunantly it's the other 1% at IEEE who write the spec. -- Richard A Steenbergen <[email protected]> http://www.e-gerbil.net/ras PGP Key ID: 0x138EA177 (67 29 D7 BC E8 18 3E DA B2 46 B3 D8 14 36 FE B6)
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