Specifications

1. Address planing

In Router mode standard IP routing is used between individual RipEX radio modems and their interfaces.

The only non-standard feature is that even if you assign all RipEX's radio interface IP addresses to a

single network, the RipEX's may not "hear" each other over the radio channel; therefore, routing tables

should include even routes within the same network (over repeaters).

This Application Note draws attention to certain situations in which routing tables can be simplified

significantly.

1.1. End devices connected via serial interface

Every RipEX radio modem has two network interfaces, and hence two IP addresses. First is the Ethernet

interface, second the radio interface. Serial interfaces are defined by their UDP port and are shared

for the entire RipEX modem; as a result both RipEX IP addresses can be used to access them (both

IP addresses work equally well).

The destination IP address of a packet received via the serial interface is determined inside the radio

modem from the "SCADA address" depending on the protocol used, either using a mask or table (see

RipEX manual, Adv. config., Protocols

). The source IP is generated similarly.

If all devices are connected to RipEX's via serial interface, it is helpful to only use the radio IP addresses

for translation and routing of data. Ethernet IP addresses may be assigned randomly (you could keep

their defaults, however we recommend setting Ethernet addresses similar to radio IP addresses to

keep things organised). Remote service access over the radio channel is also possible via the IP ad-

dresses of the radio interface.

RS232

Radio10.10.10.15

Radio10.10.10.16

Radio10.10.10.17

Radio10.10.10.18

Radio10.10.10.19

Eth192.168.141.15

Eth192.168.141.16

Eth192.168.141.17

Eth192.168.141.18

Eth192.168.141.19

Fig. 1.1: Network 1

The following paragraph shows routing tables for individual radio modems which enable mutual com-

munication between all devices. All destinations share the mask 255.255.255.255, i.e. 10.10.10.xx/32,

interface Auto or Radio:

• For 10.10.10.15

Destination via Gateway

10.10.10.17 via 10.10.10.16

http://www.racom.eu/eng/products/m/ripex/h-menu.html#protocols

Address planing