Functions
Functions | 2 |
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This chapter discusses the general functions of the OSM/ESM, in particular the properties of the switching technology.
Increased Network Performance
By filtering the data traffic based on the Ethernet (MAC) address of the DTEs, local data traffic remains local, only data intended for nodes in another network segment are passed on by the OSM or ESM. This reduces the data traffic in the network segments and lowers the network load in the network segments.
Simple Network Configuration and Network Expansion
OSMs and ESMs store the data received at the ports and the direct it to the destination address. The restriction of the network span resulting from collision detection (CSMA/CD) ends at the OSM/ESM port. With multimode
Limitation of Errors to the Network Segment Affected
OSMs and ESMs only pass on valid data. Invalid packets are discarded so that bad packets within a network segment have no effect on any other segment attached to the OSM/ESM.
Learning Addresses
By evaluating the source addresses in the data packets, OSMs/ESMs automatically learn the addresses of the DTEs attached via a particular port. If an OSM/ESM receives a data packet, it directs this packet only to the port via which the appropriate DTE can be obtained.
An OSM/ESM can learn up to 7000 addresses.
Industrial Ethernet OSM/ESM | 25 |