PCIe adapters supporting long distance 10GB fiber?

Baldur Norddahl baldur.norddahl at gmail.com
Tue Jun 20 19:07:21 CST 2017


I would expect anything mounted in a computer to have all the power you
could want. It is not like the ATX power supply cares about an extra watt
or two.

As I understand the issue it is more about cooling than power and is
primarly a concern in high density switches were you could have 48 or more
to power and cool.


Den 20. jun. 2017 18.09 skrev "Denys Fedoryshchenko" <denys at visp.net.lb>:

> I guess it depends on NIC, there is many spinoffs of Intel X520 with much
> weaker power supply circuitry.
> It might work with good NIC, but you can't rely on it on long term, IMHO.
> Even 40km Finisar SFP+ has Pdiss 1.5W. Also they mention: "The typical
> power consumption of the FTLX1672D3BTL may exceed the limit of 1.5W
> specified for the Power Level II transceivers"
> If we talk about 80km, Pdiss is 1.8W.
> While 10GBASE-LR is <1W
>
> On 2017-06-20 16:30, Max Tulyev wrote:
>
>> We use Intel NICs with SFP+ holes. It works good with long and short
>> range SFP+ modules, including CWDM/DWDM.
>>
>> On 15.06.17 12:10, chiel wrote:
>>
>>> Hello,
>>>
>>> We are deploying more and more server based routers (based on BSD). We
>>> have now come to the point where we need to have 10GB uplinks one these
>>> devices and I prefer to plug in a long range 10GB fiber straight into
>>> the server without it going first into a router/switch from vendor x. It
>>> seems to me that all the 10GB PCIe cards only support either copper
>>> 10GBASE-T, short range 10GBASE-SR or the 10 Km 10GBASE-LR (but only very
>>> few). Are there any PCIe cards that support 10GBASE-ER and 10GBASE-ZR? I
>>> can't seem to find any.
>>>
>>> Chiel
>>>
>>>


More information about the NANOG mailing list