43
Rev Version 1.4.1
Rev Version 1.4.1
NOTE Care should be taken to ensure that the device ID (Modbus address) of the remote serial device is
different from the device ID of the onboard Modbus TCP server (if its enabled, the TCP server only needs
to be enabled if the I/O registers are to be read from another external TCP client).
Figure 43 RS-232 Modbus Master Mappings
4.8 Repeaters
Wireless networks can be extended by allowing access points to behave as repeaters and forward traffic to other
access points. Access point to access point communications is also known as WDS (Wireless Distribution
System). The WI-MOD-xxx-E-5W offers very powerful WDS configuration, allowing mesh network technology with
self-healing functionality. Alternatively, fixed access point to access point links can be configured for optimized
throughput.
Each WI-MOD-xxx-E-5W access point supports up to three virtual access point or five virtual station/client
connections to other devices.
The WDS virtual interfaces will always be bridged with the main wireless interface. A WDS bridge interface allows
traffic to be bridged to another access point on the same IP network. WDS bridge interfaces do not require
additional IP address configuration because they are bridged with the standard wireless interface that is used for
connections to associated clients. All WDS interfaces on the one access point may be bridged, if required.
WDS bridge interfaces have the advantage that redundant paths are permitted when using the bridge Spanning
Tree Protocol, thus behaving as a self-healing mesh network (see section
“Bridge STP” on page 30). Bridged
networks are also not as configuration-intensive as routed networks, since WDS bridge interfaces generally do not
require IP address configuration (they inherit the IP address of the standard wireless interface).
Important notes:
•
All access points must be configured on the same radio frequency
•
Specify SSID for AP/STA modes
•
SSID and encryption is not inherited from the main network page
•
Each WDS interface can be configured with a different encryption algorithm, but each side of a single WDS link
must specify the same encryption algorithm and keys
•
A maximum of three virtual APs or five virtual client/STA applies per unit
Figure 44 Repeaters
