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Posted by binosh on January 4, 2008, 8:40 am
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> > It may be a very basic question.
> > But nobody is able to give an answer citing some statndard (I couldn't
> > find a proper answer in IEEE 802.3 also)
>
> > My assumption is that it is 2Gbps (Rx, Tx together)
>
> > Can somebody help me on this? (Please also mention where I can find
> > the documentation for the same.)
>
> All Ethernets are the same in this regard. Read IEEE Standard 802.3
> starting with Clause 12 to see the pattern.
>
> In half duplex, there is no ambiguity. Obviously, the bit rate is the
> specified one, in each direction. But you can only transmit in one
> direction at a time.
>
> When you move up to full duplex, the only difference is that now you
> have created a dedicated link to and from each host and the adjacent
> switch. Same signaling techniques, but two dedicated paths that can
> operate simultaneously. No reason to assume that suddenly the bit rate
> of each link has been cut in half.
>
> Clause 34.1.1 says:
>
> "This GMII supports 1000 Mb/s operation through its eight bit wide
> (octet wide) transmit and receive paths."
>
> Both the transmit and the receive paths provide 1000 Mb/s. And again,
> consider that half duplex 1000BASE-T exists, and the the signaling
> (physical layer) of half duplex and full duplex is identical. There
> should be no major ambiguity here.
>
> Bert
Thanks dude!!!!
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