Ethernet daisy chaining

I read this in Wikipedia near the end of the RMII docs:
http://en.wikipedia.org/wiki/RMII

"Since the RMII standard neglected to stipulate that TX_EN should only be
sampled on alternate clock cycles, it is not symmetric with CRS_DV and two
RMII PHY devices cannot be connected back to back to form a repeater; this
is possible, however, with the National DP83848 which supplies the decoded
RX_DV as a supplemental signal in RMII mode [3]."

It seems to imply you can create a simple repeater with two PHY's "back to
back" in MII mode. This would be useful for a new device we are working on
that needs to daisy chain its Ethernet in and out. I can't find much info
on how to do this, anyone done this and if so, how?

Thanks.

--
Allan Williams




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