IBA SM128V Embedded card

This configuration page opens when you click the IGMP button on the Radio Configuration form. RLXIB radios support IGMP v1 and v2. The default operation of the RLXIB radios is to have IGMP functionality enabled, although the user can disable IGMP entirely. Additionally, the user can specify settings associated with IGMP filtering and snooping. Unknown multicast addresses can be sent to all ports (flood) or to none (filtered) by changing the IGMP Multicast Filtering option. The user can specify whether or not the radio will generate IGMP queries, and configure the query interval time. By RFC specification, only one device on a network should generate IGMP queries. As such, RLXIB radios will only send a query if another device has not sent a query within its Query Interval setting, even if Query Generation is enabled.

Rapid Spanning Tree Functionality 

The software’s built-in Rapid Spanning Tree (RSTP) functionality enables you to set up full redundancy between radios or other devices. Spanning Tree shuts off ports as necessary to prevent loops. If loops are created in an Ethernet network, packets can be circulated endlessly, consuming all the bandwidth and making the network unusable. RSTP allows users to create truly redundant connections between any two points in the network. The radios detect the redundant paths and keep one connection alive for communications. If the primary connection fails for any reason, the secondary connection is quickly transitioned to a state to forward packets, allowing the network to adapt itself to handle problems without customer intervention.

RSTP uses active communications

 between network devices to propagate changes in the network and to cause transitions to occur much more quickly. Because RSTP is an IEEE standard, IH radios work in conjunction with wired Ethernet switches to form a redundant network. Each RSTP device (RLXIB Radio or Ethernet switch) communicates with other RSTP devices in the network via packets called Bridge Protocol Data Units (BPDUs). BPDUs are sent out each of the devices ports. In a wired switch this would be from each of the Ethernet ports. In an RLXIB Radio, in addition to the Ethernet port, each wireless link is considered a port. These BPDUs are the communications means to allow each RSTP device in the network to make sure that the proper connections still exist.

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