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RadioLinx RLX-IH User Manual
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Radio Configuration / Diagnostic Utility RLX-IH ♦ 802.11bIndustrial HotspotProSoft Technology, Inc. Page 39 of 99April 10, 20074.2.3 Advanced SettingsThis configuration page opens when you click the Advanced Configuration buttonon the Radio Configuration form.It is important to allow many industrial protocols to communicate properly overthe RLX-IH radios. The standard 802.11 AP operation for transmitting broadcastmessages is to accumulate them and transmit them only on specific timeintervals. This allows clients that are in power-save mode to wake up at thesynchronized time interval and receive the broadcast packets. However, thepower-save mode is rarely used in industrial networks. Additionally, manyindustrial protocols utilize multicast traffic, which is sent as broadcast messagesover the wireless network. By enabling immediate broadcasting, these multicastmessages are not delayed by the wait for the next time interval to occur beforethey can be transmitted. This results in improved network performance.RLX-IH radios support IGMP v1 and v2. The default operation of the RLX-IHradios is to have IGMP functionality enabled, although the user can disable IGMPentirely. Additionally, the user can specify settings associated with IGMP filteringand snooping. Unknown multicast addresses can be sent to all ports (flood) or tonone (filtered) by changing the IGMP Multicast Filtering option. The user canspecify whether or not the radio will generate IGMP queries, and configure thequery interval time.By RFC specification, only one device on a network should generate IGMPqueries. As such, RLX-IH radios will only send a query if another device has notsent a query within its Query Interval setting, even if Query Generation isenabled.The settings on this form also allow you to configure the transmission rate andbroadcast mode to optimize this radio's use on an industrial network.Field DescriptionDefault TX Rate The data transmission rate in Megabits per second, for this radio.Available options are: 1 Mb/sec 2 Mb/sec 5.5 Mb/sec 11 Mb/secImmediate Broadcasting Forward multicast traffic immediately, rather than waiting for specifictime intervals.Block General ProbeRequestsDo not respond to general probe requests that are not specific to theradio's SSID.IGMP Multicast Filtering Disabling filtering will cause the radio flood multicast packets to allports. |
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