Re: [8023-10GEPON] Changes to Clause 45 / D2.0
Hi Jeff,
a little late but I was locked out of my email account for quite some time. Here are some thoughts:
(1) in "FEC enable error indication" register, shouldn't we state clearly that on OLT side, the register has always the value of zero. For now, we only state that it ignores any write operations. Why not change the text from 45.2.1.93.2 "Writes to this bit are ignored and reads return a zero if the 10/1GBASE-PRX FEC does not have the ability to indicate decoding errors to the PCS layer (see @@Subclause 45.2.1.84.2@@ and @@Subclause 74.8.3@@). Any write operations to this bit are ignored in the OLT." to "Writes to this bit are ignored and reads return a zero if the 10/1GBASE-PRX FEC does not have the ability to indicate decoding errors to the PCS layer (see @@Subclause 45.2.1.84.2@@ and @@Subclause 74.8.3@@). In the OLT, reads of this bit always return zero and any writes are ignored."
(2) Is there any way for us to combine 1000BASE-PX and 10GBASE-PR FEC capabilities for describing the 10/1GBASE-PRX FEC capabilities ? When suggesting to add specific registers, I was hoping for clear description. Now I am wondering (after Pier's email) whether there is any other way ...
Any comments are more than welcome
Regards
Marek
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From: ext Jeff Mandin [mailto:Jeff_Mandin@xxxxxxxxxxxxxx]
Sent: quarta-feira, 30 de Julho de 2008 14:23
To: Hajduczenia, Marek (NSN - PT/Amadora); STDS-802-3-10GEPON@xxxxxxxxxxxxxxxxx
Subject: RE: [8023-10GEPON] Changes to Clause 45 / D2.0
Marek hi,
The 1G Upstream in PRX should behave precisely the same as it did in GEPON. So frames received with FEC errors should always be discarded (cf. 65.2.3.1). This would indicate that the red text should be retained.
Regards,
- Jeff
-----Original Message-----
From: Hajduczenia, Marek (NSN - PT/Amadora) [mailto:marek.hajduczenia@xxxxxxx]
Sent: Wednesday, July 23, 2008 10:06 AM
To: STDS-802-3-10GEPON@xxxxxxxxxxxxxxxxx
Subject: Re: [8023-10GEPON] Changes to Clause 45 / D2.0
Dear all,
Eric and Zachy pointed out that description in 1.182.x was mixed - this problem is now fixed.
Question to all interested - do we really need the text which is marked in rex in 1.182 and 1.183 ? I would imagine that we do not need to force FEC error indication funtion always on for 10G link, since we do not do it for 10GBASE-PR either. It was decided it would be optional (so can be enabled or disabled). Thus I believe the text in red can be deleted. Any comments ?
regards
Marek Hajduczenia (141238)
NOKIA SIEMENS Networks S.A.
System Architect - COO BBA DSLAM R&D
Rua Irmãos Siemens, 1, Ed. 1, Piso 1
Alfragide, 2720-093 Amadora, Portugal
* marek.hajduczenia@xxxxxxx
(+351.21.416.7472 4+351.21.424.2337
-----Original Message-----
From: Hajduczenia, Marek (NSN - PT/Portugal - MiniMD)
Sent: terça-feira, 22 de Julho de 2008 12:17
To: 'ext Jeff Mandin'; STDS-802-3-10GEPON@xxxxxxxxxxxxxxxxx
Subject: RE: [8023-10GEPON] Changes to Clause 45 / D2.0
Hi Jeff,
Thanks for the comments.
Attached please find the modified documents with changes suggested by Jeff.
regards
Marek Hajduczenia (141238)
NOKIA SIEMENS Networks S.A.
System Architect - COO BBA DSLAM R&D
Rua Irmãos Siemens, 1, Ed. 1, Piso 1
Alfragide, 2720-093 Amadora, Portugal
* marek.hajduczenia@xxxxxxx
(+351.21.416.7472 4+351.21.424.2337
-----Original Message-----
From: ext Jeff Mandin [mailto:Jeff_Mandin@xxxxxxxxxxxxxx]
Sent: terça-feira, 22 de Julho de 2008 11:04
To: Hajduczenia, Marek (NSN - PT/Amadora)
Subject: RE: [8023-10GEPON] Changes to Clause 45 / D2.0
Marek hi,
Looks good. I'd suggest the following adjustments:
A) Table 45-69
For bit 0 and bit 2, the description should have an additional sentence that reads: "In the OLT, this bit always has a value of 1."
For bit 1, the description should have an additional sentence that reads: "In the ONU, this bit always has a value of 1."
B) Table 45-70
For bit 2, change the description to read "In the ONU, a write of 1 to this bit configures the FEC decoder to indicate errors to the PCS layer. Writes are ignored in the OLT".
For bit 1, change the description to read "In the OLT, a write of 1 to this bit enables FEC in the receiver and a write of 0 disables FEC in the receiver. Writes of this bit are ignored in the ONU".
For bit 0, change the description to read "In the ONU, a write of 1 to this bit enables FEC in the transmitter and a write of 0 disables FEC in the transmitter. Writes of this bit are ignored in the OLT".
Regards,
- Jeff Mandin
-----Original Message-----
From: Hajduczenia, Marek (NSN - PT/Amadora) [mailto:marek.hajduczenia@xxxxxxx]
Sent: Tuesday, July 22, 2008 12:50 PM
To: STDS-802-3-10GEPON@xxxxxxxxxxxxxxxxx
Subject: [8023-10GEPON] Changes to Clause 45 / D2.0
Dear all,
In the light of the discussion during the last meeting, it was identified that Clause 45 is missing registers for 10/1GBASE-PRX FEC parameters. I would like to contribute initial version of the draft of new subclauses to be added to 45.2.1.92 - 45.2.1.95. Note that the proposal is tentative and subject to discussion as well as corrections. I plan to submit this in the form of a comment against D2.0.
If You have any comments, please feel free to post them with the reference to the attached document. Note that on page 16, line 37, reference is made to FEC error indication for 1 Gb/s link, which I was not able to locate anywhere in clause 65. Any hints where it might go ? Here is the text I am referring to "(see @@Subclause 77.2.3.3@@ and @@any_reference_in_clause_65@@)"
Thank You for Your time
Regards
Marek Hajduczenia (141238)
NOKIA SIEMENS Networks S.A.
System Architect - COO BBA DSLAM R&D
Rua Irmãos Siemens, 1, Ed. 1, Piso 1
Alfragide, 2720-093 Amadora, Portugal
* marek.hajduczenia@xxxxxxx
(+351.21.416.7472 4+351.21.424.2337