QSFP+ NIC to Cisco SFP switch

[applesapplesapples]

I recently picked up a server with a two ConnectX®-3 Ethernet Single and Dual QSFP+ Port Adapter Cards installed and was given two Cisco Catalyst 3560CG-8PC-S Compact Switches as well and was wondering if it's possible to get the connection from the server's QSFP+ port to the SFP port on the Cisco switch. I am not very familiar with SFP networking but based reading some other posts (Using a 40GbE (QSFP+) NIC with a 10GbE Switch (SFP+)) it seems like it may be possible? I was looking at getting a 40G QSFP+ to 10G SFP+ converter module and using an SFP+ cable to the Cisco switch but since it's only an SFP port on the switch I'm not sure that the SFP+ cable work and just use the slower SFP speed?

Any help or direction would be very appreciated!

 

[altmind]

yes, these converter modules will make sfp+ cable to work on 1g instead. this converters do work.

the alternative is to use MTP breakout cables and configure both the switch and the nic to use only 1 of the 4 strands Cisco QSFP-4SFP10G-CU50CM QSFP+ Breakout DAC Cable

 

[altmind]

added: it seems that Catalyst 3560CG-8PC-S only got 1gig SFP ports for uplinks

 

[klui]

I've never tried but Linux says CX3s support 1G.

You will not be able to connect the dense end of a breakout to older cards like what the OP has and use one lane. You can only use a QSFP to SFP adapter.

 

[fohdeesha]

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will get you a regular 1gbps copper RJ45 port you can plug into your switch, not much reason to go with an SFP dac or fiber, it'll still just be 1gbps with your switch

 

[applesapplesapples]

Thanks everyone. @fohdeesha would that adapter be ok for QSFP+ port on the cards?

Also, any recommendations for a reasonable QSFP+ switch? I was thinking of throwing the other QSFP+ card in another computer to link the two. Can the be linked directly without a switch?

 

[fohdeesha]

Thanks everyone. @fohdeesha would that adapter be ok for QSFP+ port on the cards?

Also, any recommendations for a reasonable QSFP+ switch? I was thinking of throwing the other QSFP+ card in another computer to link the two. Can the be linked directly without a switch?

yes that adapter would work in the cards. or like you said you could go directly between two PCs with a qsfp DAC, that would work no problem

 

[George_Fusioned]

Also, any recommendations for a reasonable QSFP+ switch?

Check out the Arista DCS-7050QX-32S