2.2.3. Configuration examples
You can see an example of IP addresses of the SCADA equipment and RipEX's ETH interfaces in the
picture below.
In Bridge mode, the IP address of the ETH interface of RipEX is not relevant for user data communic-
ation. However it is strongly recommended to assign a unique IP address to each RipEXs' ETH interface,
since it allows for easy local as well as remote service access. Moreover, leaving all RipEX's with the
same (= default) IP on the ETH interface may cause serious problems, when more RipEX's are con-
nected to the same LAN, even if by accident (e.g. during maintenance).
192.168.5.51/24
192.168.5.50/24
192.168.5.12/24
192.168.5.2/24
192.168.5.3/24
192.168.5.11/24
192.168.5.1/24
192.168.5.13/24
3
FEP
50
1
2
REPEATER
Fig. 2.1: Bridge mode example
Repeater
Because using the bridge mode makes the network transparent, the use of repeaters has certain limit-
ations. To keep matters simple we recommend using a single repeater. However, if certain rules are
observed, using multiple repeaters in the same network is possible.
The total number of repeaters in the network is configured for every unit individually under Bridge mode
parameters. This information is contained in every packet sent. All units that receive such packet will
resume transmission only after sufficient time has been allowed for the packet to be repeated. The
packets received from user ports remain buffered and are sent after the appropriate time passes. This
prevents collisions between remote radio modems. There can be no repeater collisions if only one re-
peater is used.
15
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RipEX in detail