Slow transfer with 21140 card

[Keith Dart]

On Wed, 22 Jul 1998, Robert G. Brown wrote:

> On Wed, 22 Jul 1998, Hannu Krosing wrote:
> 
> > You are probably right. But are the switches _always_ full-duplex ?
> 
> I'm not sure, but I thought so.  At least, I don't recall looking at
> specs on a switch that wasn't.  However, it might well be that there
> are really cheap switches that either aren't full duplex or (more
> likely) don't have a full 100 Mbps of bandwidth per port and hence
> cannot support full duplex connections between all possible pairs of
> ports at once.  Somebody out there will know for sure.  Somebody
> always does..;-)

No, they don't have to be. Most modern switches can be either full or half
duplex, and this is auto-negotiated via a protocol first developed by
N-Way. Alas, interoperability has been poor with this feature, and it
doesn't always work properly.

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Keith Dart, Devtest Engineer                   <mailto:kdart@cisco.com>
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