Network topologies
3.5 Redundant coupling of network segments
SCALANCE X-300
Operating Instructions, 10/2010, A5E01113043-10
41
For a redundant link as shown in the figure, two IE Switches X-300 must be configured within
a network segment. This configuration is set in Web Based Management, Command Line
Interface or using SNMP access. For more detailed information, refer to the "Configuration
Manual SCALANCE X-300 and SCALANCE X-400 Industrial Ethernet Switches". The two
IE Switches X-300 connected in the configuration exchange data frames with each other to
synchronize their operating statuses (one device is master and the other slave). If there are
no problems, only the link from the master to the other network segment is active. If this link
fails (for example due to a link-down or a device failure), the slave activates its link as long
as the problem persists. Reconfiguration takes place within 0.3 s.
Note
If IE Switches X-300 or SCALANCE X408-2 devices are used exclusively for redundant
coupling of the gigabit rings, the coupling links can also be designed with a gigabit
transmission rate.
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