Hi Alexandru
2 things I would want you to confirm
1) Does Dot1x work fine as standalone >>>> Yes as you have mentioned in the trailing mails.
2) MACSEC works without Dot1x also.
Please use this config for macsec below and check.
Switch A
root@labtestmacsecurity# ...|display set |match security
set security macsec connectivity-association ca1 security-mode static-cak
set security macsec connectivity-association ca1 replay-protect replay-window-size 5
set security macsec connectivity-association ca1 pre-shared-key ckn 37c9c2c45ddd012aa5bc8ef284aa23ff6729ee2e4acb66e91fe34ba2cd9fe311
set security macsec connectivity-association ca1 pre-shared-key cak "$9$BusRylvWLX-VuOclvMXxHq.PFn/9p0ORn6lKWLVboJGjmf69AuBItpIcylLXHq.f36tuO1Ick.fzn/tpxN-Vwgik.PTzbs"
set security macsec interfaces ge-0/1/0 connectivity-association ca1
Switch B
{master:0}[edit]
root@switchB# ...security |display set
set security macsec connectivity-association ca1 security-mode static-cak
set security macsec connectivity-association ca1 replay-protect replay-window-size 5
set security macsec connectivity-association ca1 pre-shared-key ckn 37c9c2c45ddd012aa5bc8ef284aa23ff6729ee2e4acb66e91fe34ba2cd9fe311
set security macsec connectivity-association ca1 pre-shared-key cak "$9$BusRylvWLX-VuOclvMXxHq.PFn/9p0ORn6lKWLVboJGjmf69AuBItpIcylLXHq.f36tuO1Ick.fzn/tpxN-Vwgik.PTzbs"
set security macsec interfaces ge-0/0/0 connectivity-association ca1
Thanks
Partha