Viper User
Manual (001-5008-000 Rev6)
Page
26
Bridge Mode Example 2:
Ethernet Subnet Mask for all units: 255.255.0.0
Network
ID:
172.20.0.0
Computer #1:
172.20.0.1 / 16
Viper
#1:
172.20.0.2
/
16
Viper
#2:
172.20.0.3
/
16
…
Viper #105:
172.20.136.125 / 16
Computer #302:
172.20.138.205 / 16
…
PLC/RTU #500:
172.20.255.253 / 16
Computer #500:
172.20.255.254 / 16
Broadcast Address: 172.20.255.255
This example is similar to Bridge Mode Example #1 except there are 65534 valid IP
addresses that may be assigned to hosts on the network.
1.1.24
Router Mode
In Router mode, each Viper has two IP addresses, an Ethernet IP address and an RF IP
Address. By default each Viper will have the same Ethernet IP Address (192.168.205.1)
and will have a unique RF IP address which is assigned at the factory. The RF IP address
will always have the form 10.x.y.z where x, y, and z is based on the last 6 digits of the
unit’s MAC address.
In Router mode, each Viper must have its Ethernet IP Address on a
unique
network. In
addition, all Vipers must have their RF IP addresses on the
same
network. The default
network is 10.0.0.0/8.
For consistent and reliable communication, the RF network
should not overlap or contain any of the IP Addresses in the Ethernet networks.
Router Mode Example 1:
Ethernet Subnet Mask: May vary from Viper to Viper.
RF Subnet Mask for all units: 255.0.0.0
Viper #1 Eth IP Address: 192.168.205.1 / 24
RF IP Address: 10.11.12.25 / 8
Computer #1:
192.168.205.2 / 24
Viper #2 Eth IP Address: 192.168.206.1 / 24
RF IP Address: 10.9.7.251 / 8
PLC
#2:
192.168.206.2
/
24
Computer
#2: 192.168.206.3
/
24
Viper #3 Eth IP Address: 192.168.207.1 / 24
RF IP Address: 10.8.0.52 / 8
PLC
#3:
192.168.207.2
/
24
Computer
#3: 192.168.207.3
/
24
Viper #4 Eth IP Address: 172.21.51.105 / 16
RF IP Address: 10.0.1.11 / 8
PLC
#4:
172.21.51.106
/
16
In this example, each Viper has an Ethernet IP address on a unique network. For Vipers
#1, #2, and #3, each network connected to their local Ethernet ports has 254 valid IP
addresses that may be assigned to other hosts. The network connected to Viper #4’s
local Ethernet port has 65534 valid IP addresses.