Afternoon Michael! This is exactly the info I needed. I misspoke when I said WX, I meant XQ.
After putting the new image on, we knew the /data/ directory still had the two sfp network setups, but we were expecting something in addition for the qsfp. It makes sense that it doesn't //need// to change since we are only using 2 lanes of one, or 2 lanes of the other. BUT, what I couldn't be 100% sure of is since white rabbit needs Ethernet as well, why wouldn't THAT be the sfp0 configuration, make sense? I'm not working the white rabbit side, but I understand it to be ip based. Lastly. If we go the pure Aurora route, I know that we lose white rabbit, but we gain a full 40Gbps, right? Thanks again. On Jun 4, 2021, 4:18 PM, at 4:18 PM, Michael Dickens <michael.dick...@ettus.com> wrote: >Hi Jason - Answers, and more. I hope this is useful and helps clarify >the >options. - MLD > >1) The N32x QSFP+ port/link/interface should work with UHD 3.15 via the >XQ >FPGA image. I haven't tried that in a while, but it did work for me >once >upon a time. > >2) When using the WX FPGA image on any N3xy, you get just SFP+ port 1 >for >data, which is just a single 10 Gb link -- not the QSFP+ port (which is >on >the N32x only, by the way). If you use the XQ FPGA image with the N32x >then >you get 1x or 2x 10 Gb links via the QSFP+ port: lanes 0 and 1 (or 1 >and 2 >if you count lanes as 1's-based). In theory you could use 2x SFP+ 10 Gb >links on a host NIC and aggregate them via fiber into a QSFP+ adapter >attached to the USRP; I've never tried this directly, but I can say >that >taking QSFP+ off a host NIC and switching lanes works fine using the >appropriate adapters and fiber cables and connectors. Just make sure >that >lanes 0 &/or 1 on the USRP side match up correctly with the other side >coming in (whatever lane[s] you choose to use, so long as it/they are >valid >on the NIC). > >3) When using the WX FPGA image with an N3xy, "ifconfig" will report >back >just "sfp1" as the 10 Gb data link that is connected to SFP+ port 1 on >the >USRP; not the QSFP+ port (which is, again, on just the N32x); this >single >link is set that up as you would any data link on a USRP and host. If >you >use the XQ FPGA image with an N32x, "ifconfig" will report back "sfp0" >and >"sfp1" as the 2 10 Gb data links, and you set those up just as you >would if >you were using the XG FPGA image. The FPGA maps between the data link >(SFP+ >or QSFP+) and the OS, so that the OS "sees" 1 or 2 10 Gb links; or >that's >how I understand this to work ... the end result is the same regardless >of >where the mapping happens :) > > >On Fri, Jun 4, 2021 at 2:26 PM Jason Matusiak ><ja...@gardettoengineering.com> >wrote: > >> I have been away from USRPs for a while but am back to using some >N3x0 >> units and am having some issues. >> >> 1 - Does QSFP work with UHD 3.15? We'd prefer not to go up to v4 yet >due >> to some issues we've seen in testing it, but I am not sure how well >> supported QSFP is on 3.15. >> >> 2 - When using the QSFP with White Rabbit (WX image), is it correct >to say >> that the QSFP link is really x2 10Gb links, not a single 20Gb? >Meaning >> that we would need a 40Gb QSFP that can handle 4 10G outputs, >correct? >> >> 3 - Lastly, I cannot find any documentation on setting up the QSFP. >I've >> downloaded a new WX image over Mender, but I don't see where/how to >> configure the QSFP. Is there an article or writeup anywhere that >walks >> through the steps? >> >> Thank you >> _______________________________________________ >> 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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