User Manual

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2009 Industrial Wireless Guidebook
Understanding Industrial WLAN – IEEE 802.11
2
Introduction to Moxa’s Dual RF Redundancy
Moxa’s advanced AP/Client AWK-5000/6000 series product line provides this kind of redundancy. The
configuration is very easy. All you need to do is select redundant AP on the AP side and redundant Client
on the client side. Then, set a different SSID for each RF. As shown in the following figure depicting the Web
console UI for Moxa’s AWK-5222, set SSID1 for WLAN1 and SSID2 for WLAN2.
Figure: Dual RF—Wireless Redundancy Mode
If both the existing Clients and dual RF clients support redundancy in the same network, Moxa’s AWK-
5000/6000 Access Point can connect both types of clients to an Ethernet network. As shown in the figure
below, enter SSID (Moxa_1_1) in the 2nd column for the AP to connect the traditional wireless clients with
this SSID to the AP.
Figure: Single RF Connection
In addition to wireless redundancy mode, Moxa’s AWK-5000/6000 advanced AP/Client devices offer
another dual RF feature called “Wireless Bridge” mode. This is designed to optimize WDS mode because of
the throughput problem for WDS. The normal eruption for throughput is throughput = 25Mbps/(n-1), where
n is the nodes number for WDS. With Wireless Bridge mode, we can keep the throughput at 10 to 15 Mbps.
Configuration is simple; simply link the Wireless Bridge master to the Wireless Bridge slave, as shown
below.
Single RF—Mesh Network
Throughput =
Ex. Around 8Mbps with 4 mesh nodes
Poor Performance
(n-1)
25 Mbps