Okay, imagine you and your friends are playing a game of passing a ball in a circle. If the ball falls or gets lost, the game stops and someone has to go look for it, right? But what if you could quickly pass the ball in a different direction to keep the game going without interruption?
That's kind of what Ethernet Ring Protection Switching (ERPS) does in computer networks. Instead of a ball, it's data packets that need to keep moving from one device to another without interruption or delay. An Ethernet ring is a loop connecting various network devices, like switches, routers, or servers. The packets travel in one direction around the loop until they reach the destination, where they're received and processed.
But sometimes the network link between two devices fails or gets disconnected, and there's no way for the packets to complete the loop. This is like the ball falling in the game, and it causes a delay or interruption in the network communication. To fix this, ERPS creates a backup path or "reroutes" the packets to another path that still connects the source and destination devices without going through the failed link.
Think of it like a secret door in your room that leads to your best friend's room next door. If the main door is locked or jammed, you can still use the secret door to sneak in and out without your parents knowing, right?
In ERPS, there are two or more paths around the Ethernet ring, and one of them is designated as the primary path, while the others are backup paths. When the primary link fails, the devices detect the problem and switch to a backup path in less than 50 milliseconds (that's really fast!). The packets keep flowing around the loop without any delay or loss, and the network continues to function normally.
So, in summary, Ethernet Ring Protection Switching is like a backup plan for computer networks that keeps the data packets flowing even if one of the links fails. It's like playing a game where you have multiple ways to pass the ball without stopping the fun. And that's how you ELI5 Ethernet Ring Protection Switching!