blocks|key|4458643|text|简短的回答:理论上是的，在实践中不是。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4458644|很长的答案:有SFP%2B光学，它也可以在1+GbE工作，我已经和正在试验并能够运行它的人进行了交谈(抱歉，没有其他来源)。不幸的是，它是高度可靠的设备，你插入的光学，即不是每一个设备在测试中能够告诉收发器下台到1+GbE。|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|E|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|F|8|@]|9|@]|A|$]]]|D|$]]

Short answer: in theory yes, in practice no.

Long answer:
There are SFP+ optics which can also work at 1 GbE, I've talked (sorry, no other source than that) to people who were experimenting with it and were able to get it running. Unfortunately it is highly dependable on the device you plug the optics in, i.e. not every device in the test was able to tell the transceiver to step down to 1 GbE.

blocks|key|4458626|text|各种光以太网标准使用不同的波长、光源和光纤直径。基于铜的以太网源可以改变频率，并且相对地使用相同的介质(类别-6A可以运行所有使用UTP的当前以太网标准)。激光或LED需要改变光源，所以你只需改变SFP/SFP%2B模块。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4458627|SFP和SFP%2B模块特定于它们所支持的标准。例如，即使在1GB光学器件中，也有多个标准(大约6个左右)，标准要求不同的SFP，加入不同的10+Gb+SFP%2Bs+(另一个6+Gb左右)，还有大约12个不同的1和10+Gb的光以太网标准，大多数标准需要不同的收发器。|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|E|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|F|8|@]|9|@]|A|$]]]|D|$]]

The various optical ethernet standards use different wavelengths, light sources, and fiber diameter. Copper-based ethernet sources can change frequencies, and use, relatively, the same medium (Category-6A can run all the current ethernet standards which use UTP). A laser or LED would need to change the light source, so you just change the SFP/SFP+ module.

SFP and SFP+ modules are specific to the standard which they support. For example, even among 1 Gb optics, there are multiple (a half dozen, or so), standards requiring different SFPs, toss in the different 10 Gb SFP+s
(another half dozen, or so), and you have around a dozen different 1 and 10 Gb optical ethernet standards, most requiring a different transceiver.

blocks|key|4458704|text|这取决于收发信机和它所连接的设备。(记录在案，我们可以将1000+10Mbps的SFP降到10+10Mbps，而不是任何人实际运行)，您必须检查这两者的规范，才能知道它是否能工作。如果是这样的话，就不太可能自动感觉到该运行的速度。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|entityMap^0^^$0|@$1|2|3|4|5|6|7|C|8|@]|9|@]|A|$]]]|B|$]]

It depends on the transceiver and the device to which it's attached. (for the record, one can run a 1000Mbps SFP down to 10Mbps, not that anyone actually does) You'll have to check the specifications of both to know if it can work. If it does, it's unlikely to be able to auto-sense which speed to run.

blocks|key|3314284|text|收发器本身可以在几乎任何比特率上运行，直到其最大指定速率。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3314285|但是，它插入的端口通常只支持一个比特率。通常情况下，即使是SFP/+SFP+%2B端口也只能以SFP(%2B)模块的速度运行，因此，10+1000BASE+SFP%2B即使具有相同的850+nm波长，也不太可能与1000BASE-SXSFP连接。|3314286|此外，SFP(%2B)端口可能不接受任何物理上适合的模块。一些SFP%2B端口通常不接受SFP模块，一些SFP(%2B)端口不接受扭对模块(尤指p)。SFP%2B)，一些SFP端口不接受100BASE-X模块，等等。有关详细信息，请查看设备兼容性列表。|3314287|有些端口可以手动配置，以便与低速SFP进行链接，但这不是规则。一般来说，双方都需要使用相同的波长，例如100+100BASE+(1310+nm)不能与1000BASE-SX+(850+nm)连接，但可能与向下配置的1000BASE-LX+(1310+nm)连接。|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|J|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|K|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|L|8|@]|9|@]|A|$]]]|H|$]]

The transceiver itself can run on practically any bit rate up to its maximum specified rate.

However, the port it is plugged into often supports only a single bitrate. Commonly, even SFP/SFP+ ports may only run at the rate the SFP(+) module is intended for, so e.g. a 10GASE-SR SFP+ will not likely link with a 1000BASE-SX SFP even though they share the same 850 nm wavelength.

Additionally, an SFP(+) port might not accept just any modules that you can fit physically. Some SFP+ ports generally don't accept SFP modules, some SFP(+) ports don't accept twisted-pair modules (esp. SFP+), some SFP ports don't accept 100BASE-X modules, and so on. Check your devices compatibility list for details.

Some ports can be manually configured down to link against a lower-speed SFP but that's not the rule. Generally, both sides need to use the same wavelength, so e.g. 100BASE-FX (1310 nm) cannot link with 1000BASE-SX (850 nm) but might with a down-configured 1000BASE-LX (1310 nm).

blocks|key|4458724|text|SFP%2B光收发信机可支持1+GbE操作。它们支持1+GbE和10+GbE双速率，并且可以配置为1+GbE。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|entityMap^0^^$0|@$1|2|3|4|5|6|7|C|8|@]|9|@]|A|$]]]|B|$]]

SFP+ optical transceivers can support 1 GbE operation. They support 1GbE and 10 GbE dual rates and can be configured for 1 GbE

blocks|key|4458748|text|的确，一些用户在10+1GbE传输中转向铜收发器，因为10+10GBASE向后兼容现有的1000BASE-T网络，这意味着它是基于数据中心的现有1+1GbE交换基础设施部署的，数据中心是用CAT6电缆连接的，或者正好相反。但是有一些10+are+SFP%2B收发器支持Gbit/s和10+Gbit/S的双速率，比如英特尔E10GSFPLR+(1000BASE-LX和10GBASE-LR+SFP%2B收发器)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|entityMap^0^^$0|@$1|2|3|4|5|6|7|C|8|@]|9|@]|A|$]]]|B|$]]

It's true that some users turn to copper transceivers in 10GbE transmission, since 10GBASE-T is backward compatible with existing 1000BASE-T networks, meaning that it be deployed based on existing 1GbE switch infrastructures in data centers that are cabled with CAT6 cabling,or just reverse. But there are some 10GbE SFP+ transceivers supporting dual rates of Gbit/s and 10Gbit/s, like Intel E10GSFPLR (1000BASE-LX and 10GBASE-LR SFP+ transceiver).

I understand that most ports that support SFP+ transceivers can step down to allow an SFP to be plugged into it, but my question is around the transceivers/optics themselves. Can an SFP+ transceiver run at 1GbE, for example a 10GBASE-SR SFP+, or would the only solution be to get an SFP specifically? 

My understanding is that, SFP+ transceivers should be used for 10GbE and SFP for 1GbE and this lack of backward compatibility is one of the few reasons 10GBASE-T is appealing (due to auto-negotiation). 

UPDATE - It appears that there are some dual-rate optics out there. Link to Finisar's offering: <a href="https://www.finisar.com/sites/default/files/downloads/finisar-ftlx8574d3bcv-1g-10g-850nm-multimode-datacom-sfp-transceiver-product-specification-revb.pdf" rel="noreferrer">https://www.finisar.com/sites/default/files/downloads/finisar-ftlx8574d3bcv-1g-10g-850nm-multimode-datacom-sfp-transceiver-product-specification-revb.pdf</a>

SFP+ transceiver's ability to do 1GbE

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我知道大多数支持SFP+收发器的端口都可以退出，允许SFP插入其中，但我的问题是围绕收发器/光学本身。SFP+收发器能否在1GbE运行，例如10 get SFP+，或者唯一的解决方案是专门获得一个SFP？我的理解是，SFP+收发器应该用于10 1GbE，SFP用于1GbE，而这种缺乏向后兼容性是10 10GBASE吸引人的少数原因之一(由于自动协商)。更新-似乎有一些双速率光学。链接到Finisa

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