[j-nsp] QSFP+ to SFP+ adapters

[Thomas Bellman]

On 2020-03-16 21:06, Chuck Anderson wrote:

> Has anyone tried using QSFP+ to SFP+ adapters such as this one?  What
> software versions have you tried?
> 
> https://www.fs.com/products/72587.html
> 
> I'm testing these on QFX10002-36Q with 17.3R3-S7.2 and SFP+ 10G-LR modules.
> The links come up and pass LLDP and IP traffic, but DOM doesn't work:

We have some equivalent adapters from Mellanox.  On a QFX5120 (running Junos
192.R1-S3) where we use those adapters, I don't get any DOM either, but on
Dell Z9100 switches (running DNOS 9.14(2.4)) I do get DOM.  However, it might
be that the Dell switches got some newer version of the adapters; I'm fairly
certain the adapters in the Dells are ones we received in 2018, while I suspect
the adapters in the Juniper are ones we got in the 2012-2014 timespan.

I might be able to check and test sometime later this week, but no promises.


-- 
Thomas Bellman,  National Supercomputer Centre,  Linköping Univ., Sweden
"We don't understand the software, and sometimes we don't understand
 the hardware, but we can *see* the blinking lights!"

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