Thanks for the reply. In the case of a pure DX-DX connection, are there problems with it negotiating to 100mBit correctly in some cases?
I think I remember reading that since SLink ports use the link speed to determine whether to use DX or GigaACE, they may not always correctly negotiate with a switch; but I would not expect that issue to come up with a pure DX device on both ends.
I will investigate the ethernet repeater but since in our case we will have power available at the midpoint the POE won’t strictly be necessary.