code: def populate_cfg_dcnm(self, cfg, dcnm_obj):
          
          if not self.fw_init:
              return
          self.dcnm_obj = dcnm_obj
          self.fabric.store_dcnm(dcnm_obj)
          self.populate_dcnm_obj(dcnm_obj)
docs: This routine stores the DCNM object.