[rescue] FDDI questions

[James Sharp]

> > Not quite true.  There are different types of ports when you deal with
> > FDDI.  A, B, M, and S.  You can plug A into B, B into A, M into A,B, or S,
> > and S into S.  A-A, B-B, and M-M are not allowed (you can plug them in,
> > but your FDDI gear will tell you to go pound sand).
> >
> such is to say that you cannot connect concentrators by their single attach
> ports?  But you can "tree" them by attaching the downstream concentrator's A
> or B port to a single attach port on the upstream concentrator, right?

Yup.  take an 8 port SAS concentrator and you can hang 8 more
concentrators off it by going A or B on the downstream to an M port on the
upstream.