Commonly used fault tolerant techniques for CobraNet networks
Intentional creation of a loop, with reliance on STP to remove it, in order to create a spare connection that will be automatically activated when a link in the network goes down.
Use of the primary and secondary Ethernet connections on a CobraNet interface along with redundant and interconnected switches. Proper use of CobraNet DualLink with redundant networks will intentionally create a loop that is automatically removed or restored by STP.