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The level of coverage “A Method for MPLS LSP Fast-Reroute Using RSVP Detours,”draft-gan-fast-reroute-00.txt, Apr.2001 • Axiowave方式 – D. Haskin et al., “A Metho for Setting an Alternative Label Switched Paths to Handle Fast Reroute,” draft-haskin-mpls-fast-reroute-05.txt, Nov.2000 • NEC方式(Shared Fast Reroute) – A. Iwata et al., “MPLS Fast reroute is a MPLS (Multiprotocol Label Switching) and IP resiliency technology to provide fast traffic recovery upon link or router failures for mission critical services. Upon any single link or node failures, it could be able to recover impacted traffic flows in the level of 50 ms. Industrial implementations can be seen in vendors such as Cisco, Juniper, Brocade, Alcatel-Lucent etc. In isis fast-reroute remote-lfa tunnel mpls-ldp [level-1 | level-2]¶ Enable per-prefix Remote LFA fast reroute link protection. Note that other routers in the network need to be configured to accept LDP targeted hello messages in order for RLFA to work.

So Vinci Systems April 2015 Remote Loop-Free Alternate (LFA) Fast Reroute (FRR) Abstract This document describes an extension to the basic IP fast reroute mechanism, described in RFC 5286, that provides additional backup connectivity for point-to-point link failures when none can be provided by the basic mechanisms. Fast Reroute är en MPLS (Multiprotocol Label Switching) och IP-flexibilitetsteknik som ger snabb trafikåterställning vid länk- eller routerfel för uppdragskritiska tjänster. Vid enstaka länk- eller nodfel kan den kunna återställa påverkade trafikflöden på 50 ms. Fast Reroute (FRR) is applicable for LSPs established using RSVP-TE. And Fast Reroute (FRR) can only protect the Primary LSP-Path, Secondary Paths can not be protected. In Secondary Paths (End-to-End Protection), the configuration overhead was too much.

Författare: David Hock; Matthias Hartmann The paper addresses optimization of three potential rerouting mechanisms based on the IP fast reroute mechanism proposed by Shand and Bryant [1].

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Now you might be thinking that this sounds familiar. After all, EIGRP has feasible successors. Because fast reroute have more specific control on traffic.
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In case of a network failure on the current LSP path, trafficis quickly routed to one of the detours. Fast Reroute MPLS TE supports local repair of TE LSPs using FRR. Traffic protection in case of a network failure is critical for real-time traffic or any other traffic with strict packet-loss requirements. In particular, FRR uses a local protection approach that relies on a presignaled backup TE LSP to reroute traffic in case of a failure.

There have been considerable efforts using FRR towards minimizing rerouting time in traditional IP and MPLS networks [12]–[15]. FRR is also believed to be easily deployable in SDN Se hela listan på baike.baidu.com Fast Reroute Extensions to RSVP-TE for LSP Tunnels (RFC 4090, May 2005) CLI Statement. M Series,T Series,PTX Series,MX Series,EX Series. Specify the fast reroute priority for a VPLS routing instance.
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Fast reroute mechanisms can be considered as subset of fast convergence. But as you can understand from this post, all the above steps are taken after the failure in fast convergence and all of them are already ready in fast reroute. In fast reroute, traffic can flow through the backup path as soon as failure is detected.