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Method and equipment for sending bidirectional forwarding detection message

A technology for two-way forwarding detection and sending equipment, applied in the field of communication, can solve the problem of inability to maintain the stability of BFD sessions, and achieve the effect of improving processing capacity and performance

Inactive Publication Date: 2011-03-23
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a scheme for sending two-way forwarding detection messages, so as to at least solve the problem in the related art that the stability of the BFD session cannot be maintained when multiple links are directly connected

Method used

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  • Method and equipment for sending bidirectional forwarding detection message
  • Method and equipment for sending bidirectional forwarding detection message

Examples

Experimental program
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Embodiment 1

[0045] In order to overcome the problem that the BFD session cannot maintain stability in the scenario of multi-link direct connection existing in the prior art, this embodiment provides a method in which the state of the BFD session does not fluctuate and the upper layer protocol does not Miscutting will occur, and the business will not be interrupted. The method can be applied to the sending end device (the sending end device and the receiving end device communicate through at least two direct links), including the following steps:

[0046] Step 1: Two devices directly connected through multi-links complete BFD negotiation and establish a BFD session. It should be noted that in the specific implementation process, it is necessary to ensure that the current number of links is not greater than the number of repeated detections of the BFD session. The total number of current member links can be determined by the current networking configuration, and the number of repeated detec...

Embodiment 2

[0051] This embodiment provides a method for sending BFD packets. The specific link to which the BFD packet is sent no longer depends on the policy set by the link aggregation protocol. A link is sent out. In this way, the repeated detection times n of the BFD session (BFD session timeout time: n * detection period) is not less than the total number of member links m, even if some member links fail, the stability of the BFD session can be guaranteed.

[0052] For example, considering that the BFD detection session down is based on the repeated detection times n * The detection period is based on not receiving the BFD message sent by the peer. Then, in extreme circumstances, if m-1 member links of the aggregated link fail, the peer will be in (m-1) * The BFD packet from the peer end cannot be received within the detection period. And n is not less than m, that is, n>m-1. In this way, it can be ensured that even if m-1 member links are down, link failures will not be falsely...

Embodiment 3

[0060] During the process of sending BFD packets, the multi-link aggregation port may add a new member port, or the active member port may switch to the inactive state, so the BFD packet sending link table must be updated synchronously.

[0061] Figure 7 It is a flow chart of updating the link table for sending BFD packets according to an embodiment of the present invention, such as Figure 7 shown, including the following steps:

[0062] In step S702, the link aggregation protocol notifies that a state of a member link of the aggregated link changes.

[0063] Step S704, judging the current state of the member link. If the member link advertised by the link aggregation protocol is inactive, go to step S706; otherwise, go to step S712.

[0064] Step S706, find the corresponding BFD packet sending link table entry according to the link aggregation port and member port notified by the link aggregation protocol.

[0065] Step S708, if the found BFD packet sending link table e...

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Abstract

The invention discloses a method and equipment for sending a bidirectional forwarding detection (BFD) message. The method comprises the following steps that: after sending end equipment and receiving end equipment finish BFD consultation and establish a BFD session, the sending end equipment searches member ports in an activated state in link aggregation ports; and the sending end equipment sends the BFD message to the receiving end equipment through the member ports in the activated state in turn. By using the method and the equipment, the processing capability and the performance of a system are improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and equipment for sending bidirectional forwarding detection messages. Background technique [0002] In order to reduce the impact of network equipment failures on services and improve network availability, an increasingly important feature of network equipment is the ability to quickly detect communication failures between adjacent systems so that other paths can be established as soon as possible to ensure uninterrupted services. [0003] Bidirectional forwarding detection (Bidirectional Forwarding Detection, referred to as BFD) is a method of link fault detection, providing low-load, fast failure detection between two various systems, including direct physical links, virtual circuits, tunnels , multi-hop routing paths, etc. BFD can also be understood as a simple "Hello" protocol, which is similar to the detection part of routing protocols in many respects. For example, BFD...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/24
CPCH04L43/0811
Inventor 王金
Owner ZTE CORP
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