[sdnog] 1G SFP into 10G port will it work ?

Manhal Mohammed manhal_muhamed at hotmail.com
Sun Jan 13 23:28:07 SAST 2019

Well that's answered my question perfectly ^_^
It will work  for my case BTW , as the link says :

-- SFP modules may can be used in SFP+ slot, but a SFP can never be connected to a SFP+ module. For their different speeds, transmission distance and wavelength. 10 SFP+ only can use for 10G SFP+ port, and can never auto-negotiate to 1G. --

Thanx  :)

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On 13 Jan 2019, at 11:01 PM, Kabantsh Alameen <kabantsh at gmail.com<mailto:kabantsh at gmail.com>> wrote:
I am so sorry to tell you that . after i did my research it will not work 😞
sorry for that for more information please check this link

Mohamed Ayman
Network Engineer
Future University

On Sun, 13 Jan 2019, 15:58 Manhal Mohammed < manhal_muhamed at hotmail.com<mailto:manhal_muhamed at hotmail.com> wrote:

Dears Nishal and Mohd...
the NIC vendor is  emulex which i think but not sure is "BROADCOM"
datasheet -> " https://docs.broadcom.com/docs/12356375?eula=true "
and i cant see any line says that it support the SFP , i will just try it and give a feedback   😄


Manhal Mohammed
System&Storage Engineer

From: Nishal Goburdhan <nishal at controlfreak.co.za<mailto:nishal at controlfreak.co.za>>
Sent: Friday, January 11, 2019 1:32 PM
To: Manhal Mohammed
Cc: sdnog at sdnog.sd<mailto:sdnog at sdnog.sd>
Subject: Re: [sdnog] 1G SFP into 10G port will it work ?

On 10 Jan 2019, at 22:34, Manhal Mohammed wrote:

> Dear Mohammed, thanx for ur reply ^_^
> the switch is not SFP+ port, only the server with the SFP+, will it be
> the same? And please elaborate more about it becase I want to know how
> it is possible, and in term of what? I need details


some 10gb ports are able to downrate to 1gb;  that’s a feature of the
chipset controlling the network interface.
some are notoriously difficult to work with though;   so to answer you
question, you’d need to know
# what chipset is on the 10gb NIC on your server.  are you able to get
this information?
# does the vendor allow this to be downrates (so, even though, say
Broadcom, might make the chip, your NIC vendor might still override its

can you track down what NIC is in the server?

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