[c-nsp] 100FX duplex

[Will Hargrave]

Church, Charles wrote:

>                 Sorry about the really basic question.  Can't find a
> definitive answer anywhere else.  Does 100FX do auto-negotiation of
> duplex?  If not, do they default to half or full?  We're seeing odd
> things on our stuff, some are Cisco to Cisco links, some are Cisco to
> various brands of media converters on into a 10/100 port.  Odd things
> such as collisions on ports set to full, huge amounts of FCS errors at
> places, etc.  The semi-dumb media converters have dip switches that
> mention duplex, but the directions seem to indication that it affects
> the copper side of it only.  Any good advice?

100FX doesn't support any form of autoneg so you need to configure all of the
devices involved. I imagine the media converters (if they are just media
converters rather than bridges) will have DIP switches which set duplex on both
sides.


Will