avoid conflicts you may turn off DHCP on the backup device or even better, split the DHCP lease range
in order to prevent any lease duplication.
Note
M!DGE assigns a priority of 100 to the master and 1 to the backup router. Please adapt the
priority of your third-party device appropriately.
Administrative status:
Enable or disable Redundancy
Role:
Role of this system (either master or backup)
VID:
The Virtual Router ID (you can theoretically run multiple instances)
Interface:
Interface on which VRRP should be performed
Virtual gateway address:
Virtual gateway address formed by the participating hosts
7.6.14. Modbus TCP
While in UHF RipEX radios, using Modbus TCP transparently was not a preferred option, in the cellular
routers, on contrary, it is a recommended solution. In such a case that all connected devices use
Modbus TCP, there is no need to use and configure this feature. Just send data transparently as TCP
over the cellular network.
But if you combine Modbus TCP and Modbus RTU within one network, you should use our Modbus
TCP solution. You do not need any external Modbus TCP - Modbus RTU converter, the functionality
is implemented in the M!DGE firmware.
The Modbus TCP daemon listens for the local TCP connection on the TCP port 502 by default. After
the connection is established, the communication can be initiated. Any incoming Modbus TCP datagram
is investigated and based on the Modbus TCP "Unit ID" Byte and Address translation Table/mask rules,
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© RACOM s.r.o. – M!DGE2 GPRS/UMTS/HSPA+/LTE router
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