SFP/SFP+ for C9200L-48P-4X

[krzysztofmaciejewskiit]

I wanted to ask, if I have a 1Gb SFP insert on one side, and I have a 10Gb SFP+ insert in the C9200L-48P-4X switch, will communication through these SFP inserts work? From what I recall, these switches only support a 10Gb insert. I'm wondering if this SFP+ insert can negotiate itself for speeds up to 1Gb or 100Mb? On the port configuration I have something like this: 

[Flavio Miranda]

@krzysztofmaciejewskiit 

 It will not work. It is not negociable. There are many use case here in the community and the conclusion is always the same. 

https://community.cisco.com/t5/switching/can-you-connect-a-10gb-sfp-to-a-standard-1gb-sfp/td-p/1818186

[MHM Cisco World]

if 10G is multiG then autonego will use speed 1 G. 
MHM

[krzysztofmaciejewskiit]

How can I check this? I'm looking on this website (https://tmgmatrix.cisco.com/?dr=8&si=C9200L-48P-4X&me=1) and I don't seem to see such information.

[Leo Laohoo · Accepted solution]

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@krzysztofmaciejewskiit wrote:
if I have a 1Gb SFP insert on one side, and I have a 10Gb SFP+ insert in the C9200L-48P-4X switch, will communication through these SFP inserts work? 

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Both ends must have the same speed and must be the same wavelength.

[krzysztofmaciejewskiit]

I think my previous search was not done correctly. I found in the documentation that the ports on the C9200-48P-4X have fixed speeds but also 1Gb, so from what I understand the 1Gb insert should also fit. 

https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-9200-series-switches/nb-06-cat9200-ser-data-sheet-cte-en.html

So, I'm assuming that using any of these inserts should work without a problem if I have an Single Mode SFP - 1Gb insert on the other side.

https://tmgmatrix.cisco.com/?dr=8&si=C9200L-48P-4X&me=1