For an ERO to take a specific hop by hop strict path through a network, does each hop have to be configured to go to the next hop? If not, how does it know which label to use? All of the configurations I’ve seen show the LER identifying all of the hops, but no changes on any of the transit devices. I don’t understand how a label shows up on a transit router and it knows which label to add to achieve a strict path.
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