#9 Viper_SC_Manual_001-5008-000_Rev12e.docx | Page 122.2.1 BRIDGE MODEBridge mode is the simplest configuration for all Viper networks. Viper may be configured for bridge mode only when alldevices are located on the same Local Area Network (LAN). Thus, all units in the network can communicate directly with allother units in the network.Each Viper has only one IP address assigned to it and the subnet mask is the same for every Viper in the network. Bridgecommunications does not require each Viper to have a unique IP address, but it is highly recommended and necessary forremote programming of the radio.Every Viper ships from the factory with the default Ethernet IP address of 192.168.205.1 and a subnet mask of255.255.255.0. The default subnet of the Viper consists of addresses from 192.168.205.0 to 192.168.205.255. The first andlast IP address of each subnet is reserved, no matter what the subnet size is. The first IP address in the subnet is theNetwork ID. The last IP address in the subnet is the Broadcast Address.Bridge Mode Example 1Example one illustrates a sample Viper network. The subnet consists of IP addresses ranging from 192.168.205.0 to192.168.205.255. The subnet mask is 255.255.255.0. This is sometimes written in shorthand notation as: 192.168.205.1/24since the subnet mask 255.255.255.0 contains 24 ones then 8 zeros when it is converted to binary.The first address 192.168.205.0 is reserved for the Network ID. The last address 192.168.205.255 is reserved for thebroadcast address. There are 254 valid IP addresses that may be assigned to hosts on the network.Ethernet Subnet Mask 255.255.255.0Network ID 192.168.205.0Broadcast Address: 192.168.205.255Viper #1 192.168.205.1/24PLC/RTU # 192.168.205.10/24Computer #1 192.168.205.100/24Viper #2 192.168.205.2/24PLC/RTU #2 192.168.205.20/24Viper #3 192.168.205.3/24PLC/RTU #3 192.168.205.30/24Viper #4 192.168.205.4/24PLC/RTU #4 192.168.205.40/24…Viper #100: 192.168.205.253/24PLC/RTU #100: 192.168.205.254/ 24