3.12. CONCLUSION
MPLS fast reroute provides protection for the traffic following link or node failures, within times that are virtually undetectable at the application layer. This is a fundamental requirement for carrying sensitive traffic such as voice or video and is an important building block for converging all services on to a common MPLS core.
Used together with traffic engineering, fast reroute can ensure adherence to strict QoS guarantees, not just in the normal case but also following a failure, thus completing the TE solution as described in Chapter 2. In the next chapter, we will explore DiffServ Aware TE, which refines the TE solution by allowing bandwidth reservations to be carried out on a per-DiffServ class basis.
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