Re: [802.3EEESG] [802.1 - 2977] Fwd: Energy Efficient Ethernet and 802.1
Bruce-
A few further comments on the topic, especially to Dan.
The underlying assumption for Ethernet Management (and it is still "largely
true") was that management was not necessary for normal network operation.
My expectation is that EEE would work under the same basic assumption. That
is, management would:
- enable or disable the feature (or subsets thereof)
- set the speeds that participate or don't in EEE
- perhaps alter the shift criteria
- perhaps enable "big speed jumps" (i.e. to other than adjacent
speeds)
- measure what EEE has done (e.g. # of speed shifts, % of time in
each speed & off)
I would not expect EEE management to be involved in real time control of
speed shifts.
Geoff
At 12:25 PM 7/11/2007 , Bruce Nordman wrote:
>My sense of our collective assumptions are that network managers shouldn't
>care
>about EEE transitions -- that they are fast enough not to be of interest.
>We have also talked about their being intended primarily (perhaps only) for
>edge links, not for links between switches and routers. If a network manager
>was concerned about losing data throughput during link speed transition times,
>I assume the answer would be to either disable the feature entirely for
>the links
>in question, or have policies to assure that transitions happen rarely --
>not any
>management that is interactive.
>
>--Bruce
>
>Grow, Bob wrote:
>>Dan:
>>
>>I hope you are able to attend the tutorial (it will be Monday evening),
>>I expect it will alleviate a number of your concerns. While proper
>>reporting of the current operational speed may be appropriate and in
>>some cases necessary, I think as you stated before, there are some
>>things about the objectives for speed change that might reduce your
>>concerns.
>>
>>...
>
>--
>Bruce Nordman
>Lawrence Berkeley National Laboratory
>BNordman@LBL.gov -- 510-486-7089