Bridge Mode - CalAmp Viper 100 User Manual

2.2.1 BRIDGE MODE

Bridge mode is the simplest configuration for all Viper networks. Viper may be configured for bridge mode only when all
devices are located on the same Local Area Network (LAN). Thus, all units in the network can communicate directly with all
other 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. Bridge
communications does not require each Viper to have a unique IP address, but it is highly recommended and necessary for
remote 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 of
255.255.255.0. The default subnet of the Viper consists of addresses from 192.168.205.0 to 192.168.205.255. The first and
last IP address of each subnet is reserved, no matter what the subnet size is. The first IP address in the subnet is the
Network ID. The last IP address in the subnet is the Broadcast Address.
Bridge Mode Example 1
Example one illustrates a sample Viper network. The subnet consists of IP addresses ranging from 192.168.205.0 to
192.168.205.255. The subnet mask is 255.255.255.0. This is sometimes written in shorthand notation as: 192.168.205.1/24
since 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 the
broadcast address. There are 254 valid IP addresses that may be assigned to hosts on the network.
Ethernet Subnet Mask
Network ID
Broadcast Address:
Viper #1
PLC/RTU #
Computer #1
Viper #2
PLC/RTU #2
Viper #3
PLC/RTU #3
Viper #4
PLC/RTU #4
...
Viper #100:
PLC/RTU #100:
255.255.255.0
192.168.205.0
192.168.205.255
192.168.205.1/24
192.168.205.10/24
192.168.205.100/24
192.168.205.2/24
192.168.205.20/24
192.168.205.3/24
192.168.205.30/24
192.168.205.4/24
192.168.205.40/24
192.168.205.253/24
192.168.205.254/ 24
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