10G SFP+ DAC between X670-G2 and Dell VxRail

[John_Valentine]

Customer is trying to connect an X670-G2-48x (fw 21.1.3.7) with Dell VxRail 500 using 3m DAC (#10305). Isn't getting any link light or anything. Dell consultant onsite so for sake of time, he tries Intel SFP+ optical transceiver in both devices and a simple fiber patch cord between the two devices. Gets link and appears to work just fine. Hasn't done any testing and doesn't have an Extreme SFP+ transceiver to use currently.

Anyone experience issues with DACs between Dell VxRail systems and XOS switches?
Any suggestions on details to look for?

Thanks!
John

[davidj_cogliane]

That matches what I have seen and would expect.

I also just found a couple data sheets that show a lot of Vxrail products require an active cable.

[John_Valentine]

David - your last comment about "3m passive on 670s"....meaning you've had this same config and it works with a Dell, right?

This is what customer has tried:
Plugging the SFP+ cable into the X670 and the Vxrail box. No link

Plugging the SFP+ cable from one Vxrail to another Vxrail. No link

Plugging the SFP+ cable from the X670 to the Black Diamond. LINK



Plugging an Intel 10G Gbic into the X670 and another Intel 10G Gbic into the Vxrail using a multimode fiber patch cable. LINK

So I was starting to think about what Bernhard stated - trying active DAC, except there isn't any onsite right now.

[davidj_cogliane]

The Dell needs an active cable?
We have used 3M passive on 670s without a problem

[Bernhard_Gruenw]

You need a active DAC. We use for those connections Brocade DAC