From the course: Implementing Cisco Software-Defined Wan (SD-WAN) for your Enterprise and Cloud
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Data redundancy elimination (DRE) - Cisco Tutorial
From the course: Implementing Cisco Software-Defined Wan (SD-WAN) for your Enterprise and Cloud
Data redundancy elimination (DRE)
- [Instructor] In this lesson we're going to talk about the data redundancy elimination engine. Now, the Data Redundancy Elimination, also known as DRE, is deduplication technology that examines data in-flight for redundant patterns, you know, patterns that we've already identified, and creates a signature for those patterns. So if you think about it, what will happen is we'll create a pattern for the traffic the first time that the traffic actually flows across. So example, if we see this pattern of traffic, that could be 32-bits, 64-bits or 128-bits, we can replace it with a simple four bit pattern, which reduces the amount of information that's going to be advertised across the WAN. So if the pattern is sent a second time, you can see where we've taken the actual payload and transcribed that into the signature. So the amount of the size of what is on this payload, DRE shrinks drastically as it sent across the WAN. And then what we'll do is we'll basically reinflate, match the…
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