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2.3.3. Router - Flexible, Configuration examples
As it was mentioned above, RipEX radiomodem works as a standard IP router with two independent
interfaces: radio and ETH. Each interface has got its own MAC address, IP address and mask.
The IP router operating principles stipulate that every unit can serve as a repeater.. Everything what
is needed is the proper configuration of routing tables.
Radio IP addresses of the RipEX's required to communicate over the radio channel must share the
same IP network. We recommend planning your IP network so that every RipEX is connected to a
separate sub-network over the Ethernet port. This helps to keep the routing tables clear and simple.
Note
Even if the IP addresses of all RipEXes in a radio channel share a single IP network, they
may not be communicating directly as in a common IP network. Only the RipEXes that are
within the radio range of each other can communicate directly. When communication with
radio IP addresses is required, routing tables must include even the routes that are within
the same network (over repeaters), which is different from common IP networks. The example
configuration below does not show such routing rules for the sake of simplicity (they are not
needed in most cases).
© RACOM s.r.o. – RipEX Radio modem & Router
Step 4
RipEX1 transmitts the reply packet from RTU1 for FEP on
Radio channel.
All RipEXes receive this packet. This packet is addressed
to FEP's RipEX, so only FEP's RipEX reacts. It checks
data integrity and transmits the acknowledgement to
RipEX1.
At the same time the packet is sent to FEP through COM2.
Step 5
FEP receives the response from RTU1 and polling cycle
continues...
However any PLC or RTU can spontaneously send a
packet to any destination anytime.
RipEX in detail
21
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