Method and device for keeping far-end session alive in LDP RLFA FRR scene
A remote and scenario-based technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as remote adjacency conflicts
Active Publication Date: 2020-08-21
FENGHUO COMM SCI & TECH CO LTD
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[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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[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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The invention discloses a method and device for keeping a far-end session alive in an LDP RLFA FRR scene, and relates to the field of data and IP transmission equipment. The method comprises the following steps: after a source equipment LDP protocol module receives an RLFA standby route, creating a first far-end entity according to far-end node equipment information in a next-hop address, sendinga far-end hello message carrying a necessary response mark to far-end node equipment, and mutually creating adjacent bodies; when a user manually configures a far-end entity, enabling a source deviceand a far-end node device to send far-end hello messages carrying marks which do not need to be responded to to each other, and creating adjacency bodies with each other; when the LDP protocol moduleof the source equipment receives a far-end hello message returned by the far-end node equipment, searching a far-end entity according to the mark type carried by the far-end node equipment, and keeping all adjacent bodies recorded in the searched far-end entity alive. According to the invention, the problem of conflict between automatic establishment of the adjacency relation and manual establishment of the far-end adjacency relation in the LDP RLFA FRR scene is solved, so the FRR service and the PW service do not influence 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...
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IPC IPC(8): H04L12/723H04L12/707H04L29/08H04L45/50H04L45/24
CPCH04L45/50H04L45/22H04L67/145
Inventor 李俊中
Owner FENGHUO COMM SCI & TECH CO LTD