C form-factor pluggable: Difference between revisions

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Revision as of 09:05, 9 July 2016

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==CFP standardization==

The CFP transceiver is specified by a [[multi-source agreement]] (MSA) between competing manufacturers. The CFP was designed after the [[small form-factor pluggable transceiver]] (SFP) interface, but is significantly larger to support 100&nbsp;Gbit/s. While the electrical connection of a CFP uses {{nowrap|10 x× 10 Gbit/s}} lanes in each direction (RX, TX),<ref name="CFP1.4">{{Cite web | title=CFP MSA Hardware Specification, Rev. 1.4 | url=http://www.cfp-msa.org/Documents/CFP-MSA-HW-Spec-rev1-40.pdf | accessdate=2010-07-02}}</ref> the optical connection can support both {{nowrap|10 x× 10 Gbit/s}} and {{nowrap|4 x× 25 Gbit/s}} variants of 100&nbsp;Gbit/s interconnects (typically referred to as 100GBASE-SR10 in 100 &nbsp;meter [[multi-mode optical fiber|MMF]], 100GBASE-LR10 and 100GBASE-LR4 in 10&nbsp;km [[single-mode optical fiber|SMF]] reach, and 100GBASE-ER10 and 100GBASE-ER4 in 40&nbsp;km SMF reach respectively.)<ref>{{Cite web | title=Operational Considerations for Deploying 100 Gigabit Ethernet | url=http://www.nanog.org/meetings/nanog51/presentations/Monday/NANOG51.Talk32.hankins-nanog51-100-gbe.pdf | accessdate=2012-01-12}}</ref>

In March 2009, [[Santur Corporation]] demonstrated a 100 &nbsp;Gigabit pluggable CFP transceiver prototype.<ref>{{cite web |title= Santur Delivers the World’s First 100Gb/s Transceiver Platform for Client Connectivity Based on Photonic Intelligent Integration |url=http://www.santurcorp.com/pressrel_03-23-09b.htm |date= March 23, 2009 |work= news release |archiveurl= http://www.webcitation.org/5iQH3sIGw |archivedate= July 20, 2009 |deadurl=yes |accessdate= May 27, 2013 }}</ref>

==Supported signals==

CFP transceivers can support a single 100&nbsp;Gbit/s signal like [[100 Gigabit Ethernet|100GbE]] or [[Optical Transport Network|OTU4]] or one or more 40&nbsp;Gbit/s signals like 40GbE, [[OTU3]], or [[STM-256]]/[[OC-768]].

==Variants==

The original CFP specification was proposed at a time when 10&nbsp;Gbit/s signals were far more achievable than 25&nbsp;Gbit/s signals. As such to achieve 100&nbsp;Gbit/s line rate, the most affordable solution was based on 10 lanes of 10&nbsp;Gbit/s. However, as expected, improvements in technology hashave allowed higher performance and higher density. Hence the development of the CFP2 and CFP4 specifications. While electricalelectrically similar, they specify a form-factor of 1/2 and 1/4 respectively in size of the original specification. Note that CFP, CFP2 and CFP4 modules are not interchangeable (but would beare inter-operable at the optical interface with appropriate connectors).

=== CFP ===

* 82mm82 mm nominal width

<ref name="CFP1.4" />

* 82mm nominal width

* 148 pin electrical connection

* integrated digital signal processor within package

* less than 24W24 [[Watt|W]] power usage

* 10x10G10×10G or 4x25G4×25G lanes

<ref name="CFP1.4" />

=== CFP2 ===

* 41.5mm5 mm nominal width

<ref>{{Cite web | title=CFP2 MSA Hardware Specification, Rev. 1.0 | url=http://www.cfp-msa.org/Documents/CFP2_HW-Spec-rev1.0.pdf | accessdate=2015-04-17}}</ref>

* 41.5mm nominal width

* 104 pin electrical connection

* no digital signal processor in package, relies on host card

* less than 12w12 W power usage

* 10x10G10×10G, 4x25G4×25G, 8x25G8×25G, or 8x50G8×50G lanes

<ref>{{Cite web | title=CFP2 MSA Hardware Specification, Rev. 1.0 | url=http://www.cfp-msa.org/Documents/CFP2_HW-Spec-rev1.0.pdf | accessdate=2015-04-17}}</ref>

=== CFP4 ===

* 21.5mm5 mm nominal width

<ref>{{Cite web | title=CFP4 MSA Hardware Specification, Rev. 1.0 | url=http://www.cfp-msa.org/Documents/CFP-MSA_CFP4_HW-Spec-rev1.0.pdf | accessdate=2015-05-06}}</ref>

* 21.5mm nominal width

* 56 pin electrical connection

* no digital signal processor in package, relies on host card

* less than 6w6 W power usage

* 10x10G10×10G or 4x25G4×25G lanes

<ref>{{Cite web | title=CFP4 MSA Hardware Specification, Rev. 1.0 | url=http://www.cfp-msa.org/Documents/CFP-MSA_CFP4_HW-Spec-rev1.0.pdf | accessdate=2015-05-06}}</ref>

=== MSA 5"x7"5″×7″ (Gen 1) ===

<ref>{{Cite web | title=Optical Integration and the Role of DSP in Coherent Optics Modules | url=http://www.ofcconference.org/library/images/ofc/2014/Market%20Watch%20and%20SPS/4-Srivastava-Market-Watch-OFC2013.pdf | accessdate=2015-04-17}}</ref><ref>{{Cite web | title=Multisource Agreement for Generation 2.0 100G Long-Haul DWDM Transmission Module – Electromechanical | url=http://www.oiforum.com/public/documents/OIF-MSA-100GLH-EM-02.0.pdf | accessdate=2015-04-17}}</ref>

* 168 pin electrical connection (designed to be built into a line card)

* digital signal processor within package

* less than 80w80 W power usage

<ref>{{Cite web | title=Optical Integration and the Role of DSP in Coherent Optics Modules | url=http://www.ofcconference.org/library/images/ofc/2014/Market%20Watch%20and%20SPS/4-Srivastava-Market-Watch-OFC2013.pdf | accessdate=2015-04-17}}</ref><ref>{{Cite web | title=Multisource Agreement for Generation 2.0 100G Long-Haul DWDM Transmission Module – Electromechanical | url=http://www.oiforum.com/public/documents/OIF-MSA-100GLH-EM-02.0.pdf | accessdate=2015-04-17}}</ref>

=== MSA 4"x5"4″×5″ (Gen 2) ===

* 168 pin electrical connection (designed to be built into a line card)

* digital signal processor within package

* less than 40w40 W power usage

==See also==