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I agree with Bob. We are getting late in the project to add
new features. Also, I don’t think the proposed idea is within the scope
of the PAR for this project and it certainly isn’t covered by the objectives
that were approved for the project. I have doubts about the merits of the
proposal similar to what Bob expresses, but if IEEE 802.3 decided to add
something similar to what is suggested, it should be done under its own
project. Regards, Pat From:
owner-stds-802-3-blade@ieee.org [mailto:owner-stds-802-3-blade@ieee.org] On Behalf Of Grow, Bob It is unlikely at this point that the
group would choose to extend the project to include changes to the
GMII/XGMII. Neither the GMII or XGMII are designed to add protocol
headers and that would I expect be something opposed by many and certainly something
that is not done simply in the 802.3 architecture. There are also many
other ways to accomplish what you propose, including things that require no
standardization (I'm guessing about the low speed ports), or above the MAC. I certainly don't understand
why switching on the line card is undesirable. No matter what you
are calling it, that is what you are doing if the low speed ports are
Ethernet. --Bob Grow From:
owner-stds-802-3-blade@ieee.org [mailto:owner-stds-802-3-blade@ieee.org] On Behalf Of ?? Hi, I'm
new to this e-mail reflector. These
couple of days, I've been thinking about extending the GMII format by putting
logical port ID in the preamble portion at the back plane transmission.(This is
similar to using LLID used in EPON). This way, one physical interface at
the back-plane can be regarded as many logical ports seen from the switch. And
we can use multiplexer/demultiplexer at the line card to connect many low speed
ports to the switch, using single high speed port, without using switches at
the linecards. This
means that we don't want frames to be switched at the line card among low speed
ports. All the switching is done by high capacity, intelligent switch in the
switch card. I
think this can be a small optional standard, or recommanded practice. But
after reviewing the presentation materials of 802.3ap, I found the scope of
802.3ap does not include GMII or XGMII. (preserve them) Is it
possible to consider optionally changing the format of GMII or XGMII in this
task force? Please
someone reply to my question. Thank
you. regards, Chan
Kim ETRI |