Multicast forwarding methods and apparatuses across autonomous systems
US-2024275714-A1 · Aug 15, 2024 · US
Fast reroute using loop free alternate next hops for multipoint label switched paths
US9178798B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9178798-B2 |
| Application number | US-201213467610-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 9, 2012 |
| Priority date | May 9, 2012 |
| Publication date | Nov 3, 2015 |
| Grant date | Nov 3, 2015 |
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Abstract
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The techniques of this disclosure provide local protection for network traffic in multipoint label switched paths (LSPs) due to link or node failure using loop-free alternate (LFA) next hops. The techniques include establishing a vanilla or point-to-point (P2P) LSP with LFA next hops between routers of a multipoint LSP for use in the event of link or node failure in the multipoint LSP. Upon a failure, the multicast traffic is tunneled between the routers using the P2P LSP with LFA to an alternate next hop with an associated label stack. The techniques of this disclosure define the label stack as including a P2P LSP label as well as a multipoint LSP label. In this way, the P2P LSP with LFA may be used for fast reroute (FRR) of traffic in the multipoint LSP until a convergence process completes for a new multipoint branch of the multipoint LSP.
First claim
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The invention claimed is: 1. A method comprising: establishing, with an upstream router using multicast extensions to Label Distribution Protocol (mLDP), a multipoint label switched path (LSP) between at least one root router and two or more leaf routers, the multipoint LSP including a direct link as a primary path between the upstream router and a downstream router; establishing, with the upstream router using a Label Distribution Protocol (LDP), a point-to-point (P2P) LSP to t…
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Frequently asked questions
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- What does patent US9178798B2 cover?
- The techniques of this disclosure provide local protection for network traffic in multipoint label switched paths (LSPs) due to link or node failure using loop-free alternate (LFA) next hops. The techniques include establishing a vanilla or point-to-point (P2P) LSP with LFA next hops between routers of a multipoint LSP for use in the event of link or node failure in the multipoint LSP. Upon a f…
- Who is the assignee on this patent?
- Esale Santosh, Qian Ted, Juniper Networks Inc
- What technology area does this patent fall under?
- Primary CPC classification H04L45/16. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 03 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).