NSO allow to delete route-target from l3nm: Tried to create l3nm with no RT, but NSO not allow this (see attached). After creation of l3nm with RT, it is possible to delete all RTs - so is this field mandatory or not? It has effect on validations we do in CNC. 
Hi Idan,'route-target-type' is mandatory when the 'vpn-target' is present.In the second screenshot , you created l3 with vpn-target list but no 'route-target-type' . that is why the error "route-target-type' is not configured".in the first screenshot , you deleted the 'route-target' list which is not mandatory.Regards,Nishad Subairhi, thank you, so when I look on the yang model, how can I tell which field is mandatory, and which is not? the question here is why NSO will not block this kind of config? l3vpn without route targets is not a real scenario. Hi Idan,route-targets is optional on device and mandatory would break backwards compatibility.Thanks,Nishad Subair