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John, It is hard at this point to separate out conceptually the implementation from the abstract PHY. One can devise a superset module that supports a number of compliant PHY implementations with some being parallel fiber based and others being
duplex fiber based. One’s choice of focus on your (a) or your (b) is their choice of favorite point of view. Both (a) and (b) are supported equally well by the module. Jeff From: John D'Ambrosia <jdambrosia@xxxxxxxxx> [External Email. Be cautious of content] All – conversation is good, and highlighting an issue that needs to be addressed. There appears to be a trend of
I can see a path to relating Item A to be within scope of Beyond 400 GbE effort. I am not seeing that same path for Item B.
John From: Ted Sprague <tsprague@xxxxxxxxxxxx>
I’m used to the second definition (independent PHYs grouped in the same MSA, common interface for management). In the first case, the module may support a unified mode or multiple individual modes – but only the second is referred to as ‘breakout’. Thanks Ted From: David Ofelt <00000d9f58951f93-dmarc-request@xxxxxxxxxxxxxxxxx>
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attachments unless you recognize the sender and know the content is safe. I think there are two different concepts that end up being colloquially referred to as breakout. The first is that case you detaiil below- a set of parallel media lanes that can be grouped in various ways- either as a single unified PHY
or as a number of slower PHYs. The other case is a module that happens to hold a number of PHYs that are completely independent- like a QSFP-DD/OSFP module that has 4 x 100GBASE-LR optics.
I’m Ok with declaring that “breakout” just covers the first case and your list is a good start at scoping the definition, but if we do that, I’d like us to figure out a name for the other case. I find that when I talk to people about modules-
it is important to clearly address both cases, since many folks have only one of the cases in mind and conversations can get confusing.
-- DaveO From: John D'Ambrosia <jdambrosia@xxxxxxxxx> [External Email. Be cautious of content] All, As I explore the scope for the Beyond 400 GbE effort, I have been having a number of conversations related to “breakout” While we all discuss it – I have never seen some actual formal definition that is agreed upon within 802.3. So I would like to get some input. I am going to start with breakout actually does and solicit input before proposing some definition to potentially use. I see break out of the following –
FR / LR / ER optics – I don’t see as being part of breakout. Thoughts? John To unsubscribe from the STDS-802-3-NGECDC list, click the following link:
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