This article explains an error seen on QFX10002 devices where while committing any changes result into the channelisation error and how to fix the problem.

While committing any changes following error is seen:

{master:0}[edit]

user@QFX10002# commit check 

[edit chassis fpc 0 pic 0 port 67 speed]

 'speed 100g'

  PIC:0 port:66 configured in 10g speed. Port 67 configured in 100G. Mode is not valid

error: configuration check-out failed

On QFX10K we have physical ports divided into port groups.

So in our case port number 66,67 and 68 are part of the same port group.

If port number 67 has the 100g speed set then we cannot use port 66 and port 68.

So the following configuration "set chassis fpc 0 pic 0 port 66 channel-speed 10g" becomes invalid configuration as when we channelize 1 interface in the port group all the 3 ports in that port group are channelized/dechannelised.

So either we need to remove

set chassis fpc 0 pic 0 port 67 speed 100g

or we need to remove

set chassis fpc 0 pic 0 port 66 channel-speed 10g

For more information please refer the following link

https://www.juniper.net/documentation/us/en/hardware/qfx10002/topics/topic-map/qfx10002-port-panel.html#:~:text=Management%20panel-,The%20default%20configuration%20is%20independent%2040%2DGigabit%20Ethernet%20for%20all,ports%20compose%20a%20port%20group.