Get the facts on SD-WAN: Understanding the most common myths


The topic of SD-WAN has been a hot one over the past several years. This makes sense because in most companies, the WAN hasn’t been updated for decades and SD-WANs have the potential to modernize the network and bring it into alignment with the rest of IT.

However, like most new technologies, I find there are a number of common misconceptions when it comes to SD-WANs. Part of the problem is that the vendor ecosystem has exploded, and the many vendors that approach the market from different angles muddy the waters — making it hard to discern what’s real, what’s misleading, and what’s downright wrong.

The top SD-WAN myths

To help buyers make sense of what’s happening in the SD-WAN world, here are seven myths to watch out for — and why they aren’t correct.

Myth 1: Forward error correction (FEC) improves application performance. FEC is a technique used to make data more reliable by encoding the message in a redundant way. Conceptually, it’s easy to understand why one might think FEC improves app performance, since it corrects for dropped packets, but it actually degrades performance. FEC makes apps more reliable, but it does so by creating more data traffic. There’s a significant difference between reliability and performance, and the two can be at odds with one another.

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