R3 Bridge E, Руководство пользователя

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5.3.3 Broadcast Repetition
EchoRing uses cooperative communication to increase reliability. A suitable Relay Station
is selected for each packet to repeat the packet if the direct link fails.
Broadcast traffic is sent to all stations in the network, and thus has no clear destination,
which makes it difficult to determine a single suitable Relay Station for all possible destina­
tions. As a result, broadcast packets are only sent once by default.
The Broadcast Repetition setting enables repetition of broadcast packets to increase reliabil­
ity. This setting only applies to Priority 1 packets. If enabled, all Priority 1 broadcast packets
are repeated once. Deduplication in cases where both packets are received is performed on
the receiving station. The Broadcast Repetition will only take place once all other Priority 1
packets not yet sent have been sent.
TIP — The repetition of the broadcast packet will take up a transmission slot. Please include this in your
capacity calculation. All priority will be dropped after the configured maximum latency. This applies to
broadcast repetitions as well.
5.3.4 Backbone IP and Port
Backbone IP is a multicast IP mask specifying the first 3 common bytes of the multi­
cast IP that the Anchor Stations subscribe to.
The range for valid IPs is 224.0.0.0 to
239.255.255.255. This information along with the Backbone Port is collectively used by
Anchor Stations on the backbone to subscribe to a multicast address made up of a multicast
port equal to the Backbone Port and a multicast IP equal to the Backbone IP appended with
subnet ID. It enables Anchor Stations to communicate with each other using a multicast
address formed by appending the Target subnet ID to Backbone IP.
5. Using the Device
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