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Bi-directional forwarding detection (BFD) method of multiple protocol label switching (MPLS) traffic engineering (TE) bi-directional tunnel and routing equipment

A detection method, a technology of two-way forwarding detection, applied in the direction of data exchange through path configuration, digital transmission system, electrical components, etc., can solve problems such as false positives, waste of BFD session resources, etc.

Active Publication Date: 2012-10-24
XINHUASAN INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of this, the present invention provides a BFD detection method and a routing device of an MPLS TE bidirectional tunnel, so as to at least solve the problems of wasting BFD session resources and the possibility of false positives in the prior art

Method used

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  • Bi-directional forwarding detection (BFD) method of multiple protocol label switching (MPLS) traffic engineering (TE) bi-directional tunnel and routing equipment
  • Bi-directional forwarding detection (BFD) method of multiple protocol label switching (MPLS) traffic engineering (TE) bi-directional tunnel and routing equipment
  • Bi-directional forwarding detection (BFD) method of multiple protocol label switching (MPLS) traffic engineering (TE) bi-directional tunnel and routing equipment

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] in such as figure 2 In the shown network of MPLS TE bidirectional tunnels, the MPLS TE tunnel from the first routing device to the second routing device (called the first tunnel) is configured on the first routing device, and the second routing device is configured on the second routing device. Device → MPLS TE tunnel of the first routing device (called the second tunnel), the first tunnel and the second tunnel form a pair of MPLS TE bidirectional tunnels. Wherein, the routing device may be a router, or a routing switch, etc., which is not limited in the present invention.

[0024] It should be noted that the first routing device and the second routing device do not specifically refer to a certain routing device, the first routing device can be any routing device in the network, and the second routing device can be any A routing device with an MPLS TE bidirectional tunnel established between devices.

[0025] like image 3 as shown, figure 2 When the first routing...

Embodiment 2

[0050] like Figure 4 as shown, figure 2 In the first routing device as a passive end, when no BFD session is established in the second tunnel, the BFD detection method of the MPLS TE bidirectional tunnel includes the following steps:

[0051] Step S402, the first routing device negotiates the BFD authentication value with the second routing device as the active end;

[0052] At this time, before the second routing device as the active end conducts BFD authentication value negotiation with the first routing device as the passive end, the operations of the second routing device are the same as steps S302 to S304 in Embodiment 1, which will not be repeated here.

[0053] The specific negotiation process can be as follows:

[0054] Step 1, the first routing device receives the MPLS RSVP-LSP ping message sent by the second routing device;

[0055] Step 2, the first routing device judges whether the MPLS RSVP-LSP ping message carries the identifier of the first tunnel (the method...

Embodiment 3

[0061] In the third embodiment, the routing device is a router, such as Figure 5 As shown in the figure, TunnelA is configured on RouterA, and TunnelB is configured on RouterB. TunnelA and TunnelB form a group of MPLS TE bidirectional tunnels. In this embodiment, the procedure for RouterA and RouterB to perform BFD detection on the MPLS TE bidirectional tunnel may be as follows:

[0062] When RouterA intends to enable BFD (mplste bfd enable) on TunnelA, it judges whether it is a bidirectional tunnel (that is, judges whether TunnelA has a bidirectional tunnel binding relationship with other tunnels), and if it is not a bidirectional tunnel, handle it according to the existing technology; If it is a bidirectional tunnel, first check whether there is a BFD authentication value corresponding to the ID of TunnelA (recorded as TunnelA ID). There are two cases 1) and 2) below:

[0063] 1) If the BFD authentication value corresponding to the ID of TunnelA is not found, it means that...

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Abstract

The invention discloses a bi-directional forwarding detection (BFD) method of a multiple protocol label switching (MPLS) traffic engineering (TE) bi-directional tunnel and routing equipment. The method comprises following steps that first routing equipment judges whether second routing equipment establishes a BFD session on a second tunnel or not, and the first routing equipment stops establishing the BFD session on a first tunnel if the second routing equipment establishes the BFD session on the second tunnel; if the second routing equipment does not establish the BFD session on the second tunnel, the first routing equipment consults a BFD discrimination value with the second routing equipment and establishes the BFD session on the first tunnel after being successful in consultation, and a corresponding relation between the second tunnel and the negotiated BFD discrimination value is stored on the second routing equipment; and in the BFD detection process of the MPLS TE bi-directional tunnel, the first routing equipment determines a status of the second tunnel on the basis of whether receiving a BFD control message transmitted by the second routing equipment within a preset time period or not, and the BFD control message is transmitted through the second tunnel after the second routing equipment finds the second tunnel corresponding to the BFD discrimination value.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a BFD detection method and routing equipment of an MPLS TE bidirectional tunnel. Background technique [0002] Transmission of packet services such as Ethernet, VoIP (Voice over Internet Protocol, Internet telephony), VPN (Virtual Private Network, virtual private network) and IPTV (Internet Protocol TV, interactive network television), as well as data-based services Mobile backhaul brings new requirements and challenges to the transport network. Packetization of transport networks, that is, Packet Transport Network (PTN), has gradually become a trend in the industry. On the one hand, people hope that PTN can truly and effectively realize the transmission of packet services; on the other hand, people hope that PTN can inherit traditional transmission networks (such as SONET (Synchronous Optical System) network) high reliability, and easy operation, maintenance and manageme...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L12/56H04L12/46H04L45/28H04L45/50
Inventor 肖湘光
Owner XINHUASAN INFORMATION TECH CO LTD
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