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At this point, you may be thinking: "Ah, I see, a TLOC is simply a tunnel endpoint, and one TLOC is equal to one tunnel.” 

Well, this is the point where it gets a little bit more complicated. Suppose we have an edge router that connects to the Internet. The router has one local TLOC - one that represents the Internet uplink. By default, the SD-WAN solution behaves as shown in the diagram below.
 

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