| name <Name of Virtual Device Object>
 | Object name | Specifies the name of the Virtual Device object. Mandatory parameter, if this is the first command in a transaction. | 
                                                    
                                                        | vs_mtu <MTU>
 | Integer | Specifies the Global MTU value for all interfaces. This parameter is applicable only for a: Default is 1500 bytes. | 
                                                    
                                                        | instances <Number of IPv4 CoreXL Firewall instances>
 | Integer | Specifies the number of IPv4 CoreXL Firewall instances. This parameter is applicable only for a: Default is 1. For more information about CoreXL, see R81 Performance Tuning Administration Guide. | 
                                                    
                                                        | instances6 <Number of IPv6 CoreXL Firewall instances>
 | Integer | Specifies the number of IPv6 CoreXL Firewall instances. This parameter is applicable only for a: Default is 1. For more information about CoreXL, see R81 Performance Tuning Administration Guide. | 
                                                    
                                                        | main_ip <Main IPv4 Address>
 | IPv4 Address | Specifies the main IPv4 Address of the Virtual Device object. This parameter is applicable only for a: 
                                                                
                                                                    Virtual System
                                                                    
                                                                    Virtual Router
                                                                     
                                                                
                                                                
                                                                
                                                                    
                                                                        | 
                                                                                  | Note - To remove the current IPv4 address, set the value to "empty". For example:set vd name VS1 main_ip empty |  | 
                                                    
                                                        | main_ip6 <Main IPv6 Address>
 | IPv6 Address | Specifies the main IPv6 Address of the Virtual Device object. This parameter is applicable only for a: 
                                                                
                                                                    Virtual System
                                                                    
                                                                    Virtual Router
                                                                     
                                                                
                                                                
                                                                
                                                                    
                                                                        | 
                                                                                  | Note - To remove the current IPv6 address, set the value to empty. For example:set vd name VS1 main_ip6 empty |  | 
                                                    
                                                        | calc_topo_auto {true | false}
 |  | Specifies how to calculate topology based on routes: This parameter is applicable only for a: 
                                                                
                                                                    Virtual System
                                                                    
                                                                    Virtual Router
                                                                     |