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2021-12-02
Industrial network failures pose a significant safety and economical risk. While no network is completely failproof, backup systems can help minimize these risks. As such, redundancy has become widely recognized as an essential aspect of any industrial network. There are many different ways to enhance redundancy in a network. One way is by relying on a redundant ring topology.
■ Ring topology
When relying on a redundant ring, an important factor to consider is how the topology of the ring relates to the network’s physical layout. Another factor to consider is the recovery time, the recovery time is much more critical in industrial applications than commercial ones.
First, let’s start with a general overview of ring topology.
A ring topology is a network configuration where each networked device is connected to two other devices on either side of it to form a circular “ring” data path. When data is transferred in a ring topology, the data is sent in one direction along the single continuous pathway. Each device has a repeater which will forward the data until it reaches the device in the topology that the data was intended for.
■ How ring topologies enhance network redundancy
The redundant ring topology provides a convenient way to enhance the redundancy of your network by eliminating a single point of failure. In the case that a device in the ring fails, the backup ring will link every other device to each other. Therefore, data can continue being transported to other nodes in a ring even if a network node goes down.
In addition to preventing communication failure, this topology also allows for easy maintenance. the ring topology isolates the individual cable failures to one network segment for easier repair.
■ HRUI ring redundancy solutions
As mentioned above, we recognize the importance of a reliable, redundant network. All HRUI Industrial managed switches support the ring network redundancy function. Using the market’s open standard ITU-T under G.8032 ERPS (Ethernet ring protection switch) protocol, HRUI devices have a minimal network recovery time of less than 12ms. The ERPS protocol also provides recovery switching for Ethernet traffic while preventing loops from forming at the Ethernet layer.
