Thread Links Date Links
Thread Prev Thread Next Thread Index Date Prev Date Next Date Index

Re: XGMII or SPI-4 ?


The XGMII is specified in the standard as between the MAC/RS
and the PHY layers. The SPI-4 is not a part of the IEEE standard
but rather an interface specified by the OIF. It is often
considered to exist "above" the MAC layer. Since it is not
specified, and since none of the interfaces specified in the
P802.3ae draft are mandatory, the use of either, neither or
both is completely acceptable. The market will eventually
decided which interfaces are preferred.


> Wang Wendeh wrote:
> Hi all,
> Maybe this thread has been discussed before, but I just added in this
> mailing list for a few days.
> Can anyone tell me which one ( XGMII or SPI-4) will be adopted for
> implementation between
> link-layer and physical-layer device? The 10G standard proposes XGMII,
> while it seems to be that
> vendors favor SPI-4, right? Or maybe this two interfaces can co-exist
> ??
> Thanks a lot!
> WenDeh

Benjamin Brown
2 Commerce Park West
Suite 104 
Bedford NH 03110
603-641-9837 - Work
603-491-0296 - Cell
603-626-7455 - Fax
603-798-4115 - Home Office