[nsp] 100Mb Ethernet Design Rules - Propagation delay

[Ong Beng Hui]

>>>Still the same, 100 meters. The main problem with 100 Mbps Ethernet is
>>>      
>>>
>the signal degradation in the TP cable. Full duplex does nothing to fix
>this.
>
>Is there any contraint on distance if fiber optic is used between two
>100Mbps ethernet port?
>
>e.g.
>
>   Siwtch ----------O/E-------------------------O/E-------- Switch
>                 (cable)           (optical fiber)            (cable)
>
>  
>
Hi,

The last time I look at it, there is an issue with Spanning Tree if the 
propagation delay
hit a certain value. Let me look it up again. Someone was talking about 
Ethernet over
around 7000 miles worst case previously.