Tuesday, September 20, 2016

Brocade VDX: What Is A Breakout Cable And How To Configure For It?

It's not as hard to grasp once you see it. It's a 1 QSFP to 4 SFP+ (40gig to 10gig).  Notice the larger 40 gig side on the left, and the four 10 gig on the right.

VDX1(config)# interface FortyGigabitEthernet 1/0/50
VDX1(conf-if-fo-1/0/50)# shut
VDX1(conf-if-fo-1/0/50)# exit
VDX1(config)# interface FortyGigabitEthernet 2/0/50
VDX1(conf-if-fo-2/0/50)# shut
VDX1(conf-if-fo-2/0/50)# exit
VDX1(config)# hardware
VDX1(config-hardware)# connector 1/0/50
VDX1(config-connector-1/0/50)# sfp breakout
VDX1(config-connector-1/0/50)# exit
VDX1(config-hardware)# connector 2/0/50
VDX1(config-connector-2/0/50)# sfp breakout
VDX1(config-connector-2/0/50)# exit
VDX1(config-hardware)# exit


  1. Replies
    1. Basically, when you configure with the "sfp breakout", you are telling it "make 4 sub interfaces on fortygig 1/0/50. It will look like "fortygigabitethernet 1/0/50:1, 1/0/50:2, 1/0/50:3, and 1/0/50:4". They will only have 10gig capability, not 40gig at this point.

  2. I know this was posted a while back, but I need to get some of these and I'm getting lost in all the combinations available!

    Are the sub interfaces treated as individual 10Gb interfaces, so I could connect 4 separate servers to the breakout cable? or can you only use them to connect 4x10Gb to another switch?


    1. You can break out the 40g ports to 4 10g ports. You have to have the break out cable to do this.


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