I have a couple of 6509's that have GBIC's in them. I've generally used orange fiber patch cords for the connections which I believe are multi-mode. I also have some connections coming from another building with single mode fiber in between the buildings. To connect switches between these buildings I use orange fiber patch cords which, like I said, I believe are multi-mode.
My questions are, how do I tell whether I have multi or single mode GBIC's? How do I tell if my patch cords multi or single mode? Are there consequences for mixing multi-mode and single-mode fiber?
Thanks in advance,