Dear Alex,
Thank you very much for your input. I have tested the configuration you provided and it works.
However, I have found another solution which can also bring up LACP between end to end switches.
set interfaces xe-0/0/0 encapsulation ethernet-bridge
set interfaces xe-0/0/0 unit 0 input-vlan-map push
set interfaces xe-0/0/0 unit 0 input-vlan-map vlan-id 123
set interfaces xe-0/0/0 unit 0 output-vlan-map pop
set interfaces xe-0/0/1 encapsulation ethernet-bridge
set interfaces xe-0/0/1 unit 0 input-vlan-map push
set interfaces xe-0/0/1 unit 0 input-vlan-map vlan-id 123
set interfaces xe-0/0/1 unit 0 output-vlan-map pop
set bridge-domains VL123 interface xe-0/0/0.0
set bridge-domains VL123 interface xe-0/0/1.0
Any advices or idea about pro and con between these two configuration template?
Regards,