Verify if shaping is applied by running:
show class-of-service interface <int>
Generate excessive traffic and check
show interfaces <int> statistics
Should show that shaping is indeed hapening.
If for some reason that doean't work you may try this:
set class-of-service schedulers sched-queue-shap-60m shaping-rate 60m set class-of-service scheduler-maps sched-map-be-60m forwarding-class best-effort scheduler sched-queue-shap-60m set class-of-service interfaces <int> scheduler-map sched-map-be-60m
Regards, Wojtek