[Beowulf] connect Mellanox IB FDR adapter to QLogic IB QDR switch?

Håkon Bugge hakon.bugge at gmail.com
Thu Jun 6 22:58:34 PDT 2013

On 6. juni 2013, at 10.52, Marko Kobal wrote:

> Hi,
> I have a cluster with QLogic IB QDR switches (QLogic 12200 (iDPx) 
> 36-port QDR InfiniBand Switch), currently there are servers with QLogic 
> QME7342 QDR HCA adapters connected to those IB switches.

> I've got a couple of Mellanox IB FDR adapters (MT27500 Family 
> [ConnectX-3]) and I wonder if they would play nicely with existing IB 
> network.

IBM OEM'ed QLogic switches at some point in time, and used Mellanox HCAs. My impression was that that road had it bumps. There are some ex QLogic people on this list, which can correct me here.

One thing for sure, you must make sure the Mellanox firmware in the HCAs are configured to run IBTA link initialization. I expect they run a Mellanox proprietary initialization by default.

> Has anybody got any experiences in mixing QDR and FDR IB, especially 
> connecting Mellanox FDR adapters to QLogic QDR IB switches?

As stated above. In addition, the Uni New Hampshire (www.iol.unh.edu) has a network interoperability lab, which in the past has done work in this area.

Thanks, Håkon

> -- 
> Kind regards, Marko Kobal
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