IEEE P802.3ba标准修订反馈分析报告

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IEEE P802.3ba标准规定了物理层和数据链路层的规范，其中涉及高速网络技术。该文件记录了对规范中某一章节（Clause 85.11.1.1）的评论，该章节涉及硬件接触定义。特别是，文件中提到了QSFP+（四通道小型热插拔封装）连接器的规格问题。评论指出，表85-12中的硬件接触定义与QSFP+连接器的规格相冲突，因为QSFP+规范中规定接触点27为模块存在引脚，而在铜模块的情况下，该表要求接触点27应为开放状态，这与SFF-8436标准相违背。SFF-8436标准定义了高速串行光纤通道小型接口（SFP），包括QSFP+的电气规格。IEEE 802.3ba的目标之一是促进其他文档中定义的行业标准电缆的使用，因此解决这一规格冲突对于确保兼容性和标准化至关重要。评论类型（Comment Type）被标记为“T”和“TR”，可能表示技术评论和临时评论。而评论状态（Comment Status）标记为“X”，可能意味着这些评论已经被记录，但尚未被最终解决或包含在正式标准中。文件中还提到Quellan公司（现为Intersil的一部分）和Cinch Connectors公司的人员，Jim McGrath和Gourgen Oganessyan，他们可能参与了这个评论过程。综上所述，该文件涉及网络标准制定过程中对具体技术参数的讨论，反映了在国际标准制定中解决技术细节，以确保设备之间的互操作性和一致性的重要性。"

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IEEE P802.3ba D2.2 40Gb/s and 100Gb/s Ethernet comments Draft 2.2 Comments WG 2nd recirculation ballot

Proposed Response

Comment Type

The header is not consistent with repect to having a space between the number and unit.

Starting on this page there is not space, but there should be a space.

SuggestedRemedy

Change:

IEEE 802.3ba 40Gb/s and 100Gb/s Ethernet Task Force

To:

IEEE 802.3ba 40 Gb/s and 100 Gb/s Ethernet Task Force

Comment Status

Response Status

Mark, Gustlin Cisco

Proposed Response

P L

Comment Type

The CR4/10 Host IL (85-14) and the nPPI recommended electrical channel (86A-19) both

defined with connector and test fixtures) should be IDENTICAL also for low frequencies

(see page 4 of mazzini_01_0909).

SuggestedRemedy

Harmonize the curves as above.

Comment Status

Response Status

Mark, Gustlin Cisco

Proposed Response

P L

Comment Type

The recommended maximum loss for the PCB only (without connector) (Draft 2.2, page

446, row 51), should be aligned with formula 85A-2 (Transmitter and receiver differential

printed circuit board trace loss) that gives maximum PCB loss @5.156GHz = 3.5dB (see

page 4 of mazzini_01_0909).

SuggestedRemedy

Harmonize the loss.

Comment Status

Response Status

Mark, Gustlin Cisco

Proposed Response

P L

Comment Type

The cable assembly test fixture (85-35) and the MCB (86A-5) loss formulas must be

IDENTICAL. In D2.2 losses just cross at same value @ 5.165GHz (see page 5 of

mazzini_01_0909).

SuggestedRemedy

Harmonize the loss.

Comment Status

Response Status

Mark, Gustlin Cisco

Proposed Response

P L

Comment Type

The test fixture (85-16) and the HCB (86A-4) loss formulas must be IDENTICAL.

In D2.2 losses just cross at same value @ 5.165GHz. (see page 5 of mazzini_01_0909).

SuggestedRemedy

Harmonize the loss.

Comment Status

Response Status

Mark, Gustlin Cisco

Proposed Response

85.10.10.1

266

Comment Type

The connector loss (calculated as 85-37 values minus 85-35 and 85-16) of the test fixture

improves when frequency increase (see slide 5). Above formulas should be corrected to

avoid this.

SuggestedRemedy

As above.

Comment Status

Response Status

Mark, Gustlin Cisco

TYPE: TR/technical required ER/editorial required GR/general required T/technical E/editorial G/general

COMMENT STATUS: D/dispatched A/accepted R/rejected RESPONSE STATUS: O/open W/written C/closed U/unsatisfied Z/withdrawn

SORT ORDER: Comment ID

Comment ID #

Page 9 of 47

9/4/2009 6:10:21 PM

IEEE P802.3ba D2.2 40Gb/s and 100Gb/s Ethernet comments Draft 2.2 Comments WG 2nd recirculation ballot

Proposed Response

86A

86A.6

444

Comment Type

Formula 86A-19 seems incorrect from in the range from 0.2 to 7GHz, should be

= -0.114-0.8914*?f-0.846*f

SuggestedRemedy

Change the + to a -.

Comment Status

Response Status

Mark, Gustlin Cisco

Proposed Response

5.10

211

Comment Type

There is no limit to the potential increment rate of the PRBS31 checker referenced in

49.2.12.

The checker implementation is difficult to match at high increment rates or in the

prescence of burst errors (the source synchronous descrambler implementation error

multiplication factor depends on burst pattern).

There will be less scope for a complex implementation in a PMA device versus a PCS.

For most practical purposes stringent matching of the 49.2.12 implementation is not

necessary. It would be sufficient to match the result of a 49.2.12 implementation only for

isolated single bit errors and at errors rates less than 1 in a thousand.

SuggestedRemedy

Replace:

(see 49.2.12)

With:

The PRBS31 checker shall match the results of the checker implementation in 49.1.12 for

isolated single bit errors and at errors rates less than 1 in a thousand.

There will be a contribution at the September interim to support this comment

[Editor's Note: Commenter did not indicate comment type. Assigned comment Type TR]

Comment Status

Response Status

Szczepanek, Andre HSZ Consulting Ltd

Proposed Response

8.11.1

329

Comment Type

" With the sinusoidal interference and sinusoidal jitter turned off, greater than two thirds of

the dB value of the VECP should be created by the selection of the appropriate bandwidth

for the fourth-order Bessel-Thomson filter."

Provide a range rather than a limit for the Bessel-Thomson Filter contribution

SuggestedRemedy

Change to :

" With the sinusoidal interference and sinusoidal jitter turned off, between 0.6 and 0.7 of the

dB value of the VECP should be created by the selection of the appropriate bandwidth for

the fourth-order Bessel-Thomson filter."

There will be a contribution at the September interim to support this comment

[Editor's Note: Commenter did not indicate comment type. Assigned comment Type TR]

Comment Status

Response Status

Szczepanek, Andre HSZ Consulting Ltd

Proposed Response

8.11.1

329

Comment Type

" The sinusoidal jitter added should result in at least 0.05 UI peak to peak DCD."

This is the only indication of a minimum DCD requirement in the draft and is not normative

anyway. This sentence is redundant and should be removed.

SuggestedRemedy

Remove the sentence.

Comment Status

Response Status

Szczepanek, Andre HSZ Consulting Ltd

TYPE: TR/technical required ER/editorial required GR/general required T/technical E/editorial G/general

COMMENT STATUS: D/dispatched A/accepted R/rejected RESPONSE STATUS: O/open W/written C/closed U/unsatisfied Z/withdrawn

SORT ORDER: Comment ID

Comment ID #

Page 10 of 47

9/4/2009 6:10:21 PM

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IEEE P802.3ba标准修订反馈分析报告

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