def get_in_seg_vlan(cls, tenant_id):
        """Retrieves the IN Seg, VLAN, mob domain. """
        if tenant_id not in cls.serv_obj_dict:
            LOG.error("Fabric not prepared for tenant %s", tenant_id)
            return None, None
        tenant_obj = cls.serv_obj_dict.get(tenant_id)
        return tenant_obj.get_in_seg_vlan()