40G QSFP+ to 4 SFP+ on MX960

Thu Feb 24 23:12:40 UTC 2022

 ❦ 25 February 2022 00:46 +03, Paschal Masha:

> Has anyone managed to get the 40G QSFP+ to 4 SFP+ breakout cable to work on the 2X40GE QSFPP Juniper MICs? 
>
> Which commands did you use to channelize the port under the "chassis
> fpc" mode to get it to channelize to 4x10g at least for one 40G port
> on that MIC?

That's explained here:
https://www.juniper.net/documentation/us/en/software/junos/interfaces-ethernet/topics/topic-map/port-speed-configuration.html

"set chassis fpc 0 pic 0 port 0 speed 10g" enables the split to 4x10G.
You should get xe-0/0/0:0, xe-0/0/0:1, xe-0/0/0:2 and xe-0/0/0:3. The
"number-of-sub-ports" is not mandatory (at least on MX10003, never tried
on MX960).
-- 
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