We have run multiple ConnectX-4 NICs in bonded MLAG (Arista) and VPC (Cisco) 
switch configurations on our NSD servers.  We used to see issues with firmware 
versions that didn’t support the optics we wanted to use (e.g. early CX3/CX4 
and Cisco 40G-BiDi).  You may also want check mstflint to see whether the 
firmware levels match on the MLX cards, and if you upgrade firmware in some 
cases a power-cycle (not reboot) can be required to finish the process.

-Paul

From: [email protected] 
[mailto:[email protected]] On Behalf Of Andrew Beattie
Sent: Wednesday, December 20, 2017 4:47 PM
To: [email protected]
Subject: Re: [gpfsug-discuss] more than one mlx connectx-4 adapter in samehost

IBM ESS building blocks can have up to 3 dual port 10GBEth, 40GB Eth, 56GB IB, 
100GB IB Mlx adapater cards, because we have 2 IO nodes this is up to a total 
of 12 ports per building block
so there should not be any reason for this to fail.

I regularly see a Mix of 10GB / 40GB or 10GB / IB configurations



Regards
Andrew Beattie
Software Defined Storage  - IT Specialist
Phone: 614-2133-7927
E-mail: [email protected]<mailto:[email protected]>


----- Original message -----
From: "J. Eric Wonderley" <[email protected]<mailto:[email protected]>>
Sent by: 
[email protected]<mailto:[email protected]>
To: gpfsug main discussion list 
<[email protected]<mailto:[email protected]>>
Cc:
Subject: Re: [gpfsug-discuss] more than one mlx connectx-4 adapter in same host
Date: Thu, Dec 21, 2017 6:37 AM

Just plain tcpip.

We have dual port connectx4s in our nsd servers.  Upon adding a second 
connectx4 hba...no links go up or show "up".  I have one port on each hba 
configured for eth and ibv_devinfo looks sane.

I cannot find anything indicating that this should not work.  I have a ticket 
opened with mellanox.

On Wed, Dec 20, 2017 at 3:25 PM, Knister, Aaron S. (GSFC-606.2)[COMPUTER 
SCIENCE CORP] <[email protected]<mailto:[email protected]>> wrote:



We’ve done a fair amount of VPI work but admittedly not with connectx4. Is it 
possible the cards are trying to talk IB rather than Eth? I figured you’re 
Ethernet based because of the mention of Juniper.

Are you attempting to do RoCE or just plain TCP/IP?

On December 20, 2017 at 14:40:48 EST, J. Eric Wonderley 
<[email protected]<mailto:[email protected]>> wrote:
Hello:

Does anyone have this type of config?

The host configuration looks sane but we seem to observe link-down on all mlx 
adapters no matter what we do.

Big picture is that we are attempting to do mc(multichassis)-lags to a core 
switch.  I'm somewhat fearful as to how this is implemented in the juniper 
switch we are about to test.

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