Can you help check the following:
1) What is the exact QSFP+ configuration utility used?
Is it downloaded from
2) You mentioned cards already in 40Gb mode despite the "invalid configuration" error reported in qcu64e, does it mean the XL710-QDA2 is running in 40GBps connection without problem?
3) Can you try using other QSFP+ utility (dated 2/18/16 or 3/14/16) and cehck if the same issue persist?
4) When you try to run the command below, what is the output?
qcu64e -nic=1 /set=2x40
5) How many ports were active on the affected XL710-QDA2( are you referring to one QDA port connects to 40Gb switch port?)
Feel free to update me.
1) the first link for Linux
2) Yes, luckily they are working without any problem in 40Gbps mode
3) Just tried it, same result
4) Here it is:
qcu64e /NIC=1 /SET=2x40
Intel(R) QSFP+ Configuration Utility
QCU version: v2.26.17.06
Copyright(C) 2015 by Intel Corporation.
Software released under Intel Proprietary License.
Adapter supports QSFP+ Configuration modification.
Current Configuration: 2x2x10A (Top 2 lanes on Module0; Bottom 2 lanes on Module 1)
2x2x10A (Top 2 lanes on Module0; Bottom 2 lanes on Module 1)
Error: The chosen configuration is not supported by this adapter.
5) We have 2 ports active in 40Gb mode
Can you also provide the serial number and marking on the affected XL710-QDA2 and installed module?
Here is the link where you can refer to locate the serial number:
For the installed modules, please provide all the numbers written on the modules.
Thanks for your time on this.
Than you for the info. Yes the link is not for the XL710 but the serial number should be something similar to that format but with additional digits. The serial number of XL710 should be in the format of 15 digits + 6 digits + 6-3
xxxxxxxxxxxxxxx xxxxxx xxxxxx-xxx
What is the brand of the modules?
This behavior is due to errata #48 reported in the Intel® Ethernet Controller XL710: Specification Update. The actual QCU (not the adapter firmware) is noticing that your adapter is using B0 silicon which was affected by this errata, and deciding not to allow a configuration change back to 40 GbE mode.
This errata doesn't matter if you are operating in 10 GbE mode. If your adapter(s) need to operate in nx40 GbE mode, we'd rather you get warranty replacements than trying to downgrade the firmware to trick it into working... as you can see from the errata description it's not a trivial issue.
Apologies for the lack of documentation around this change in QCU behavior, it was an oversight on our part and we'll be fixing that shortly.