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RPR network

In terms of topology, the Resilient Packet Ring (RPR) is a double ring on which data can be sent in both directions with different priorities. The data in the ring always have priority. In the event of an error, the inner ring is connected to the outer ring and data transmission

is restored. Restoration takes less than 50 ms. Two protection mechanisms are provided in the RPR standard for the event of an error: steering and wrapping. In Steering, in the event of an error, the node that detects the error sends a message to all network nodes. From the information

sent, the nodes recognize the direction in which the following packets must be sent in the event of an interruption. In the function comparable works the wrapping, which works with hardware controlled switching.

Structure of the Resilient Packet Ring (RPR)

Structure of the Resilient Packet Ring (RPR)

In the Resilient Packet Ring, the data packets are placed in the ring by a start node and taken out again directly by the destination node. This is called destination stripping. The data packets therefore only run from the start node to the destination node, which may well be two consecutive nodes. In contrast to Token Ring or FDDI, this procedure leads to a significant bandwidth saving. Only with multipoint connections does the data frame pass through the entire ring.

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Englisch: RPR network
Updated at: 04.03.2008
#Words: 203
Translations: DE