| http://www.w3.org/ns/prov#value | - Finally, while it was possible for a provisioned PVC or SVC to change its path through the carrier's backbone, it is much more likely to actually happen with traffic-engineered paths in MPLS. You should keep track of how much delay your circuits have, and if you see this number suddenly and mysteriously change, there is a good chance your packets are taking a different path as a result of a failure
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