Hi Michael,
I obtained the necessary SFP+ optical adapters and now I am trying to
put uhd 3.13.1.0 on the N321s in order to use the WR synchronization.
Unfortunately, when I update the sd card image with 3.13.1.0 the N321
boots but the SFP0 and SFP1 do not go up. When I try to run
uhd_find_devices, on a terminal using the USB port it says no UHD
devices are found.
I believe that the right FPGA image should be put on the FPGA, but the
ways described in Knowledgebase are not working.
Is there a way to put the version 3.13.1.0 on the N321? I have tried
version 4.0.0.0 and it is working fine, but WR is broken.
BR,
Vladica
On 22.06.21 21:31, Michael Dickens wrote:
I'm using primarily FS adapters, cables (single and multi mode), and
fiber connectors (to allow multiplexing lanes). The adapters I bought
were "generic" and had to be tweaked using an FS BOX to be fully
compatible with Intel or Mellanox NICs. This tweaking seems to have
helped a lot with the 100 Gb interface (E810); the 10 Gb interfaces do
not show much benefit to be manufacturer specific -- though I'm sure
it doesn't hurt! I have not tried a multi-mode to single mode splitter
/ joiner, but I'd suppose they do exist & if anybody here has had
experience that would be useful to hear about! I hope this is useful!
- MLD
On Tue, Jun 22, 2021 at 10:05 AM Vladica Sark <[email protected]
<mailto:[email protected]>> wrote:
Hi Michael,
Thanks for the answer. For now for the data I am using DAC cables,
but
we would need larger distances, i.e. 50+ meters, and for this I would
need fibers for both WR and data.
Is there also some optical multiplexer for these wavelengths, in
order
to use a simplex fiber, for both WR and data?
BR,
Vladica
On 22.06.21 15:41, Michael Dickens wrote:
> Hi Vladica - I've tested a variety of fiber adapters and cables
with
> no issues (e.g., ZyXEL, FS, Axcen). The primary keys are to make
sure
> the various related parameters match up between the adapters and
> cables and devices. For example: If the adapter is 1490/1310,
then you
> want to make sure the cable is for the same wavelengths. Same
for the
> fiber polish and other parameters (single / dual fiber ; . Some are
> easier than others, none of this is too difficult luckily!
>
> For short distances, a DAC cable will work for all of the N320/N321
> SFP interfaces.
>
> At the moment, WR support is being fixed for UHD 3.14.0.0 to
current.
> If you -require- WR support -right now- you can use UHD 3.13.1.0
while
> we're working out how to fix WR for newer UHD. We expect the fix
to be
> available to customers sometime in mid/late-July (2021); once
the fix
> is determined and verified we will commit it to the various
branches
> of the UHD repository, and it will be available in UHD -after- the
> forthcoming 4.1 release. It will be available in the public UHD
> repository for folks to use to patch UHD between releases.
>
> I hope this is useful! - MLD
>
>
> On Tue, Jun 22, 2021 at 6:19 AM Vladica Sark
<[email protected] <mailto:[email protected]>
> <mailto:[email protected] <mailto:[email protected]>>>
wrote:
>
> Dear all,
>
> I would like to use N321 with WRS 3/18 which uses optical
cables. I
> would like to use also for the 10 Gbit SFP1 optical SFP+
transceiver.
> Do you have some recommended optical SFP+ adapters, duplex and,
> preferably, simplex?
> The idea is to use a duplex monomode fiber, one fiber for
the 10 Gbit
> data and one fiber for WRS synchronization.
> They would be connected to 10 Gbit switch or QNAP
Thunderbolt to SFP+
> adapter, so they do not have to be Intel.
>
>
> Best regards,
>
> Vladica
>
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