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Method, device and equipment for detecting forwarding table

A network detection device and forwarding table technology, applied in the field of communications, can solve problems such as packet loss or error in data packets, errors in forwarding entries, and failure of network devices to generate forwarding entries.

Active Publication Date: 2020-04-28
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the IP network does not guarantee reliability, when there are abnormalities such as packet loss or errors in data packets, it may be due to link failures in the network, or the corresponding forwarding table entries have not been generated on the network equipment, or the generated forwarding table entries caused by error

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  • Method, device and equipment for detecting forwarding table
  • Method, device and equipment for detecting forwarding table
  • Method, device and equipment for detecting forwarding table

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Embodiment Construction

[0064] In the technical solution provided by this application, the network detection device generates a detection message including TTL and link label, specifies the label forwarding path of the detection message through the label stack, and specifies the number of hops passed by the detection message through the TTL, for Detecting whether the forwarding table of the network node to be detected on the forwarding path from the network detection device to the destination IP address is correct. Specifically, the network detection device determines the number of hops N from the network detection device to the network node to be detected and the link label of each hop according to the network topology information, and generates a detection message, which includes a label stack and a TTL; It includes N link labels (link labels of N hops in turn), and the TTL value is M plus 1, that is, N+1. During the process of forwarding the detection message from the network detection device to t...

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Abstract

The present application provides a method, device and equipment for detecting a forwarding table. The network detection equipment generates a detection message including a label stack, TTL, source IP address and destination IP address according to network topology information; the label stack includes N chains Road label, the value of the TTL is N+1, and N is the number of hops from the network detection device to the network node to be detected; the network detection device sends the detection report according to the link label at the top of the label stack and receive the notification message sent by the next hop of the network node to be detected, that is, the feedback node, the network detection device can determine the network topology information according to the IP address of the feedback node in the notification message and the Check whether the forwarding table of the network node is correct, so as to quickly locate the fault.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method, device and equipment for detecting forwarding tables. Background technique [0002] In an Internet Protocol (IP for short) network, in the routing table of the control plane of the network device, there is a routing table entry corresponding to an IP address, for example, the IP address 192.168.1.1 corresponds to a routing table entry 192.168.1.0 / 24. In the network device, what guides the forwarding of data packets is a forwarding table (forwarding table) of a forwarding plane (usually a forwarding chip), which may also be called a forwarding information base (forwarding information base, FIB for short). The forwarding table of the network device is usually generated according to the optimal route in its routing table, and may also be generated through an Address Resolution Protocol (Address Resolution Protocol, ARP for short). [0003] Since the IP network does...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/26H04L45/02H04L45/28H04L45/74
CPCH04L43/10H04L45/745H04L45/02H04L43/0823H04L41/0677H04L45/26H04L41/0659H04L41/40H04L41/122H04L43/20H04L41/12H04L1/00H04L12/40H04L12/44H04L41/06H04L61/50H04L61/5007H04L69/324
Inventor 李国平张震伟
Owner HUAWEI TECH CO LTD