a network arrangement 110 in this case the network devices 100 200 300 used are each redundantly equipped with two cpus 2 3 202 203 302 303 and associated switch devices 4 5 204 205 304 305 the switch devices of a network node are communicatively coupled to each other in the network node 100 the switch device 4 is coupled to the switch device 5 internally via ports 11 12 the switch devices 204 205 of the second node 200 are similarly coupled to each another internally via ports 211 212 similarly the switch devices 304 305 of the third node 300 are coupled to each other via the ports 311 312 the redundant availability of cpus 2 3 202 203 302 303 means it is possible to provide the functionality of the network devices 100 200 300 redundantly and therefore reliable data may still be generated if one of the cpus fails in addition the redundant and separate implementation of the switch devices 4 5 204 205 304 305 achieves a further level of safety the vlans vl 1 vl 2 are implemented as was described with regard to fig1 the respective cpus 2 3 202 203 302 303 however receive the data sent via the vlans redundantly and therefore a consistency check may be performed internally the sets of data from the redundant cpus which are labeled u201c channel.