6. HX3040 Redundancy
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For further details on configuration and diagnostics of NIC Teaming ports see HX3040 CPU Ethernet
Ports Configuration .
IP Change Methods
Projects carried out with a Hadron Xtorm Series redundant CPU provide a method for IP change of
the Ethernet ports NET1 to NET6. This method, named Active IP, defines the ports’ behavior,
regarding its IP, according to the current CPU redundancy state (Active or Non-Active) and its
identification (CPUA or CPUB).
Each NET interface requires three IP addresses. For NIC Teaming or Switch mode, the system
requires three IP addresses for the pair of NETs rather than making individual settings.
Active IP
This method is used in the redundant HX3040 CPU NETs. In this method, there is an IP for the
Active CPU and two more IPs, one for the CPUA and another for the CPUB. In the redundant
HX3040 CPU NETs, the Active IP address is related to the Active CPU interface.
The MODBUS communication protocol, both client and server, use the local IP of the CPU. On the
other hand, the DNP3 protocol uses the Active IP to communicate. As for the communication with
the MasterTool, one must use specifically the CPUA or CPUB IP address.
Figure 6-3. Active IP Method – Redundant HX3040
Parameters that must be considered in Active IP method of a HX3040 redundant CPU:
Active IP Address: IP address related to the CPU when it is in Active state
CPU A IP Address: CPUA communication address, no matter its state
CPU B IP Address: CPUB communication address, no matter its state
Subnetwork Mask:subnetwork mask of Ethernet bus of CPUs
Gateway Address: gateway address of Ethernet bus subnetwork
