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Loop detection method and device

A loop detection and forwarding path technology, applied in the network field, can solve problems such as time-consuming and low efficiency, and achieve the effect of improving inspection efficiency

Active Publication Date: 2017-05-31
BEIJING HUAWEI DIGITAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Embodiments of the present invention provide a loop detection method and device to solve the problem of time-consuming and low efficiency in manually detecting loop faults

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Embodiment Construction

[0054] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0055] The device referred to in the embodiment of the present invention may be a network-side edge device, or a router, or a packet transport network (Package Transport Network, PTN)) device or the like.

[0056] The time-to-live (Time To Live, TTL) field referred to in the embodiment of the present invention is used to indicate the maximum number of network segments allowed to pass before the IP data packet is discarded by the router, that is, the maximum number of hops that the IP data packet can forward in the computer network . The TTL is set by the sending host to prevent packets from continually looping endlessly over the IP internetwork. The maximum value for TTL is 255.

[0057] Specifically, the TTL field is set by the sender of the IP data packet. On the entire forwarding path of the IP data packet from the source address to the destination address,...

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Abstract

The invention relates to the technical field of the network and in particular to a loop detection method and a device in order to solve the problems of manual detection loop failure that the time-consuming is low and the efficiency is low. The method comprises the following steps: while a first device receives a message in which the time to live (TTL) is 0, the destination IP address of the message in which the TTL is 0 is obtained, the first device generates a loop detection message, the destination address of the loop detection message is the destination IP address, and the source address of the loop detection message is the IP address of the first device, the loop detection message comprises a device information field, the device information field is used for recording identification information of each device through which the loop detection message passes, and the device information field comprises the identification information of the first device; and the first device determines the forward path according to the target address of the loop detection message, and forwards the loop detection message according to the forward path.

Description

technical field [0001] The invention relates to the field of network technology, in particular to a loop detection method and device. Background technique [0002] In a three-layer network, such as a long-term evolution (Long Term Evolution, LTE) network, refer to figure 1 As shown in the figure, problems such as routing configuration or equipment failure will cause a loop fault, which will result in the inability to successfully send packets to the destination address and cause service damage. If it is too large and the link bandwidth resource is fixed, the normal non-looped packets will be discarded, causing normal non-looped service failures. [0003] For example, figure 1 In a subnet, the edge devices (Provider Edge, PE) 1, PE2, PE3, and PE4 on the network side constitute a loop fault, so that the packets are forwarded circularly among PE1, PE2, PE3, and PE4, so that the purpose cannot be achieved. address. In addition, PE3 and PE4 may also form loop faults with devi...

Claims

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Application Information

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IPC IPC(8): H04L12/705H04L12/26H04L12/24H04L45/18
CPCH04L41/0631H04L41/0677H04L43/10H04L45/18
Inventor 陈刚
Owner BEIJING HUAWEI DIGITAL TECH
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