QSFP to 4x SFP cable (e.g. QSFP-4X10G-AC7M)

[mho00000111]

Hi,

if i connect such a cable / module to my Nexus 3064-T, will there be 4 configurable 10G interfaces on the Nexus side? Would it be possible to connect 4 different devices with a cable like this?

Best regards,

Mark

[Reza Sharifi]

Hi,

Yes, there will be 4 10Gig interfaces.  Depending on the switch, there is a command to breakout the 40Gig to 4 10Gig. And yes you can connect 4 10Gig devices to these cables.  They are just like any other 10Gig interface.

Here is an example for the 6ks.

switch# configure terminal
switch(config)# interface breakout slot 1 port 1-12 map 10g-4x
switch(config)# copy running-config startup-config

http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus6000/sw/interfaces/6x/b_6k_Interfaces_Config_Guide_Release_6x/b_6k_Interfaces_Config_Guide_Release_602N12_chapter_0101.html

HTH

[Iulian Vaideanu · Accepted solution]

I believe it's "hardware profile portmode" for Nexus 3K (changing it requires saving the config and reloading the device) - here's how it looks on a 3064X / 3064PQ:

sw0(config)# hardware profile portmode ?
  48x10g+4x40g  48x10G+4x40G port mode
  52x10g+3x40g  52x10G+3x40G port mode
  56x10g+2x40g  56x10G+2x40G port mode
  60x10g+1x40g  60x10G+1x40G port mode
  64x10g        64x10G port mode

[Reza Sharifi]

Thanks for the info.

I guess because the 3064x is not modular (unlike the 6ks and 5ks), you can only manipulate the 40Gig uplinks..

[mho00000111]

Hi!

Thanks a lot for the answers. Is it possible to determine the QSFP Port that I want to split up?

Best regards,

Mark

[Iulian Vaideanu · Accepted solution]

I've never done it but I can't find any other configuration commands relevant to 40G-10G port conversion, so I don't think you can (choose which 40G ports to split) - that is, the 1x40G profile will split the first 40G port (and give you interfaces Eth1/49/1 to Eth1/49/4), the 2x40G profile will also split the second 40G port (to Eth1/50/1-4) and so on.

[mho00000111]

In deed, I have done

(config)# hardware profile portmode 56x10G+2x40G

and got

interface Ethernet1/49/1

interface Ethernet1/49/2

interface Ethernet1/49/3

interface Ethernet1/49/4

interface Ethernet1/50/1

interface Ethernet1/50/2

interface Ethernet1/50/3

interface Ethernet1/50/4

interface Ethernet1/51

interface Ethernet1/52

Thanks again for the help!

[Iulian Vaideanu]

Just to correct myself a bit here - it's the "3x40G" profile that will only split the first 40G (thus leaving three 40G ports available)...  I got it right about the second one though :).