on 1e2w's and 2e2w's you can set full/half duplex on the 10Mbps ports
On Wed, 28 Feb 2001, Marty Adkins wrote:
> Priscilla Oppenheimer wrote:
> >
> > Regarding the original question, though I couldn't find a URL to confirm
> > this, I don't think the Ethernet AUI port on the 2500 series Cisco router
> > supports full duplex. I think the 2500 routers came out before full duplex
> > Ethernet existed for one thing. Also, I doubt that it is possible to
> > support full duplex with an AUI attachment. You would need a way to tell
> > the transceiver to ignore collision detection, and that's probably not
> > supported.
> >
> The 2500 e0 is definitely half-duplex CSMA/CD only. It uses a LANCE chip
> as its "NIC" which predates fast Ethernet. AFAIK, there are no Cisco
> routers with 10Mb Ethernets that support full-duplex. Prior to the
> introduction of fast Ethernet in the industry, there were a few NIC
> vendors that added full-duplex capability to 10Mb cards. But it never
> really caught on; plus it was superceded by 10/100.
>
> Marty Adkins Email: [EMAIL PROTECTED]
> Mentor Technologies Phone: 240-568-6526
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>
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