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Beginner

QSFP-40G-SR4 to four SFP-10G-SR

Hello,

In 40G QSFP transceivers data sheet, regarding SFP-40G-SR4, Cisco wrote:  "It can also be used in a 4x10G mode for interoperability with 10GBASE-SR interfaces up to 100m and 150m on OM3 and OM4 fibers, respectively."

So, can i connect Nexus 5572UP equipped with "six true QSFP ports" to Nexus 7706 using QSFP-40G-SR4 on the side of 5572UP, and 4 x SFP-10G-SR on the side of 7706? Somehow, i think that this is not possible, but i want to be sure...

 

Thanks,

Wojtek

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Hall of Fame Expert

Hi,

So, can i connect Nexus 5572UP equipped with "six true QSFP ports" to Nexus 7706 using QSFP-40G-SR4 on the side of 5572UP, and 4 x SFP-10G-SR on the side of 7706? Somehow, i think that this is not possible, but i want to be sure...

Yes, there are cables with 40Gig interface on one side and 4 10Gig SFP (LC connector) on the other side.

see figure-21 in this link:

http://www.cisco.com/c/dam/en/us/products/collateral/switches/nexus-9000-series-switches/white-paper-c11-729384.pdf

HTH

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Hi All,

I have qsfp40g-4sfp10g-cu5m , will be splitted to 4 times 10 GB port , if I setup to independant port , can I connect it directly to servers ?

Saleem

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Beginner

You can break out the single 40G port into 4 separate 10G ports and use a QSFP to 4 LC breakout cable to connect one or more of the 10G ports to the 7706.  You have to enter the following command to enable the 10G breakout of the 40G port though:

 

interface breakout slot <slot #> port <port range>  map 10g-4x

 

I believe you have to specify the port range as groups of 3 on the 5600 platform and they are on module 2 so the command would look like this:

 

interface breakout slot 2 port 1-3 map 10g-4x to breakout the first 3 40G ports into 12 10G ports.

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