Tunnel establishment method, device and system

A tunnel establishment and tunnel technology, applied in the field of communication, can solve the problem of establishing tunnels for nodes that cannot RSVP

Active Publication Date: 2019-11-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present application provides a method, device and system for establishing a tunnel to solve the problem in the prior art that a node supporting RSVP cannot establish a tunnel between a node supporting RSVP and a node supporting SR protocol

Method used

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  • Tunnel establishment method, device and system
  • Tunnel establishment method, device and system
  • Tunnel establishment method, device and system

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Embodiment Construction

[0046] This application is applied to a hybrid networking scenario of nodes supporting SR-TE and nodes supporting RSVP-TE.

[0047] In this embodiment of the application, a node may also be referred to as a network device, and a network device is a device that provides routing and forwarding functions in the network, for example, it may be a router, a switch, a forwarder, or a label switching router (labelswitching router, LSR), etc., Not limited. In the subsequent description process, the node is taken as an example for illustration.

[0048] Below to figure 1 As an example to briefly explain the working principle of RSVP-TE, take the establishment of a tunnel from node R1 to node R8 as an example:

[0049] The ingress node R1 calculates the path to be passed by the RSVP-TE tunnel through CSPF according to the constraints configured on the RSVP-TE tunnel, such as specified paths, bandwidth constraints, link coloring, and other conditions. Take the route R1->R2->R4->R8 as a...

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Abstract

The invention discloses a tunnel establishment method, device and system, which are used for solving the problem that an RSVP-TE tunnel is adhered to or passes through an SR-TE tunnel in the prior art. The method comprises: a first network device receives a first request message sent by a previous hop network device, the first request message being used for requesting to obtain an RSVP-TE label ofthe first network device, the first network device supporting RSVP-TE and SR-TE, and the previous hop network device supporting RSVP-TE; when the first network equipment determines that at least onepiece of network equipment in downstream network equipment of the first network equipment supports SR-TE on the path of the to-be-built tunnel; an SR-TE tunnel from a first network device to a secondnetwork device of at least one network device is established, a tunnel identifier for identifying the SR-TE tunnel is generated, the first network device sends a first response message to a previous hop network device, and the first response message comprises the tunnel identifier.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a tunnel establishment method, device and system. Background technique [0002] Resource reservation protocol-traffic engineer (RSVP-TE) is a multiprotocol label switching (multiprotocol label switching, MPLS)-TE tunneling technology using RSVP. The ingress node of the tunnel entrance is based on the constrained shortest path forwarding (CSPF) routing protocol. After the path calculation is completed, the tunnel ingress node generates a path (Path) message carrying the label request information, and follows the CSPF routing protocol The calculated path is sent to the egress node at the end of the tunnel hop by hop, for each node to obtain the label of the next hop node from the next hop node; subsequent packets are forwarded based on the label of the next hop node. [0003] Segment routing-traffic engineering (SR-TE) is a new type of MPLS TE tunnel that uses...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/721H04L12/723H04L12/911H04L45/50H04L47/724
CPCH04L47/825H04L47/821H04L47/72H04L45/38H04L45/50H04L45/34H04L12/4633H04L47/724H04L45/507H04L45/04
Inventor 胡志波姚俊达
Owner HUAWEI TECH CO LTD
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