I assume you are talking about a NIC connected to a 36xx switch, that being the case:
It depends to a large extent on the way the drivers are programmed for the card. Most manufacturers use the following combinations in the order specified before the card falls back to half duplex 10mbps
1. 100mbit + full duplex
2. 100mbit + half duplex
3. 10mbit + full duplex
4. 10mbit + half duplex
The optimal settings are usually specified in the manual for your NIC if not you can consult the online documentation perhaps?
First of all I assume that you are talking about the old "ethernet 10BT" modules and not about the more recent 10/100Mb versions. The latter do support auto negotiation and for the ethernet modules I remember a forum-thread for a few years ago. Bottom of the line was that the ability to support full duplex was not only depending on the hardware but also on the IOS version. Please also check the URL below:
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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