Hey Rob, thanks for getting back to us on the resolution. Yeah, we have seen issues with different (Q)SFP modules over the years -- not all work with USRPs.
--M On Sat, Jun 21, 2025 at 12:22 AM Rob Kossler via USRP-users < usrp-users@lists.ettus.com> wrote: > Update. The optical transceiver model that I was using is labeled > "QSFP-CWDM4-100G". I also have some older models "QSFP28-IR4-100G" which I > believe are the same item (just with the model renamed at some point). In > any case, if I use the IR4 model in the X410 with either the IR4 or the > CWDM4 model in the workstation E810 NIC, it now works! So, the fact that > the 2 different model names can talk to each other must imply that the > technology (CWDM x4) is the same. And, the fact that the X410 is happy > with the IR4 model means that it can handle this technology. I don't > really have an explanation why the CWDM4 model does not work in the X410. > Rob > > On Fri, Jun 20, 2025 at 4:19 PM Rob Kossler <rkoss...@nd.edu> wrote: > >> Hi, >> I just received an X410 and I am having trouble getting the 100Gb link to >> work. >> >> - On the workstation side, my NIC is an Intel E810 CQDA2 and I am >> using UHD-4.8 with Ubuntu 24.04 LTS >> - On the X410 side, I loaded the UHD-4.8 file system and the UC_200 >> FPGA image which implements 100Gb on SFP1. >> - Finally, I am using Fiberstore CWDM4 100Gb >> <https://www.fs.com/products/65219.html?now_cid=1159> optical >> transceivers with a duplex single-mode fiber. This item is my current >> suspected culprit - it's not clear to me whether the operation of this >> optical transceiver is transparent to the 100Gb port or if the port needs >> to handle things differently for this type of CWDM transceiver >> >> The problem is that I never even get link lights on the workstation NIC >> when I connect to the X410. However, if I move the QSFP28 transceiver from >> the X410 to another workstation (with a Mellanox 100Gb NIC), the link >> lights come right up on both sides and the OS sees a 100Gb Ethernet link. >> >> So, the problem "appears" to be that the X410 does not like this optical >> transceiver. Does anyone have any experience using this optical transceiver >> with the X410? >> >> Thanks. >> Rob >> > _______________________________________________ > USRP-users mailing list -- usrp-users@lists.ettus.com > To unsubscribe send an email to usrp-users-le...@lists.ettus.com >
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