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A method and device for keeping alive a remote session in an ldp RLFA FRR scenario

A remote, scenario-based technology, applied in transmission systems, electrical components, etc., to solve problems such as remote adjacency conflicts

Active Publication Date: 2022-04-08
FENGHUO COMM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects existing in the prior art, the object of the present invention is to provide a method and device for keeping alive a remote session in an LDP RLFA FRR scenario, which solves the problem of automatically establishing an adjacency relationship and manually creating a remote session in an LDP RLFA FRR scenario. The problem of peer adjacency conflict makes FRR service and PW service independent of each other

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  • A method and device for keeping alive a remote session in an ldp RLFA FRR scenario
  • A method and device for keeping alive a remote session in an ldp RLFA FRR scenario
  • A method and device for keeping alive a remote session in an ldp RLFA FRR scenario

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0035] see figure 1As shown, the solutions of the present invention and related embodiments are performed under the scenario of LDP RLFA FRR. As shown in the figure, in the basic MPLS network, the label switching path between PE1 and PE2 is the active LSP of the network. In order to implement LDP FRR when the link between PE1 and PE2 fails, the backup route required by LDP is calculated by the relevant module of LFA. In the figure, the backup route of PE1-P2-PE2 is established through the LDP tunnel from PE1 to P2. After the LDP module obtains the RLFA route from the routing management module, it finds that the next hop is a tunnel interface, and needs to automatically establish an adjacency relationship with the remote node device corresponding to the next hop address, then establish a remote session, and distribute LSP labels.

[0036] see...

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Abstract

The invention discloses a method and device for keeping alive a remote session in an LDP RLFA FRR scenario, and relates to the field of data and IP transmission equipment. The remote node device information in the address creates the first remote entity, and sends a remote hello message carrying a must-response flag to the remote node device to create an adjacency with each other; when the user manually configures the remote entity, the source device and the remote node End node devices send remote hello messages carrying no response tags to each other, and create adjacencies with each other; when the source device LDP protocol module receives the remote hello messages returned by remote node devices, it searches for remote end entity, and keep alive all adjacencies recorded in the found remote entity. The invention solves the problem of the conflict between the automatically established adjacency relationship and the manually created remote adjacency relationship in the LDP RLFA FRR scenario, so that the FRR service and the PW service do not affect each other.

Description

technical field [0001] The invention relates to the field of data and IP transmission equipment, in particular to a method and device for keeping alive a remote session in an LDP RLFA FRR scenario. Background technique [0002] MPLS (Multi-Protocol Label Switching, Multi-Protocol Label Switching) supports multi-layer labels, and the forwarding plane is connection-oriented, so it has good scalability, making it possible to provide customers with various services on a unified MPLS / IP basic network architecture . Through the LDP protocol (Label Distribution Protocol, label distribution protocol), the label switching router (Label Switched Router, LSR) can directly map the routing information of the network layer to the switching path of the data link layer, and dynamically establish the LSP of the network layer ( Label Switched Paths, Label Switched Path). [0003] Specifically, in the MPLS LDP protocol, the link characteristics and topology information of the network are cal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L45/50H04L45/247H04L67/145
CPCH04L45/50H04L45/22H04L67/145
Inventor 李俊中
Owner FENGHUO COMM SCI & TECH CO LTD