10g & 1g in cisco switch

[13jobsp90]

In Cisco switches do 10g sfp ports means upto 10g speed or only 10g ?Can we connect 1g module in it for all models of Cisco switches?If not what are those series of models?

[ammahend]

10G means upto 10G, you can connect 1G SFP.

[13jobsp90]

Is it for all models of Cisco switches of all series??

[shambhu.kumar]

Checked with Catalyst 9600/9500/9400/9300/3800, you can connect 1G SFP as well

Hope this will help

Regards

[ammahend]

generally Yes, I can’t answer for every single model. 

[Joseph W. Doherty]

If the Cisco port is SFP+, it will support gig or 10g SFPs.  Otherwise, it will only support one speed.

Most current Gen Cisco devices that support 10g SFPs are likely the dual speed SFP+.

https://community.fs.com/article/the-ultimate-guide-to-sfp-compatibility-sfp-sfp-vs-sfp28-sfp-vs-qsfp28-qsfp.html?origin=serp_auto

[13jobsp90]

So from my understanding based on above link, if cisco port is 10G SFP+ it will support both 10g and 1 g. And if port is just SFP, only 1 speed is either 10g or 1 g. Am I right?

[Joseph W. Doherty · Accepted solution]

Correct, but again, believe any current Cisco gen 10g SFP port will likely be a SFP+.