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Method and device for processing neighbor entries

A processing method and neighbor table technology, applied in the field of communication, can solve problems such as aggravating the impact of network attacks, equipment interruption, and failure to process NA response messages in time, so as to reduce the impact of network attacks and reduce equipment interruption.

Active Publication Date: 2020-08-07
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on the above situation, when there are a large number of ND attack packets (attack packets include NS packets, NA response packets, etc.) Only packets can detect network attacks. At this time, if there are neighbor entries in the Probe state in the device, it will be impossible to process NA response packets in time to a large extent, and the neighbor entries will be deleted, causing the device to disconnect and aggravate the situation. impact of cyber attacks

Method used

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  • Method and device for processing neighbor entries
  • Method and device for processing neighbor entries
  • Method and device for processing neighbor entries

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] Currently, in the ND technology, the state information of the neighbor included in the neighbor entry includes:

[0035] Incomplete (incomplete) state: Indicates that the address is being resolved, but the neighbor link layer address has not yet been determined;

[0036] Reachable state: indicates that the address resolution is successful and the neighbor is reachable;

[0037] Stale state: Indicates that the reachable time is exhausted, and it is not ...

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Abstract

Embodiments of the present invention provide a method and device for processing neighbor entries. The method includes: when a network attack is detected, if no restriction entry is issued and the first neighbor corresponding to the first neighbor entry in the Probe state is detected Complete, then determine whether to receive the first NA response message sent by the first neighbor for detection; if the first NA response message is not received, then update the state of the first neighbor entry to the Departed state; wherein, Departed The state is used to indicate that the neighbor entry is discarded but has the forwarding function. By applying the embodiments of the present invention, in the case of a network attack, device outages can be reduced, and the impact of the network attack can be alleviated.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to a method and device for processing neighbor entries. Background technique [0002] In ND (Neighbor Discovery, Neighbor Discovery) technology, based on IPv6, after each device learns each other's MAC (Media Access Control, Media Access Control) addresses, it generates and stores neighbor entries, which include: Link layer address (MAC address), neighbor status information (for example: reachable (Reachable) status, failure (Stale) status, delay (Delay) status, detection (Probe) status, etc.), the status of neighbor entries at this time It is Reachable state. When a packet triggers a neighbor entry, the packet can be sent according to the neighbor entry; if no packet that can trigger the neighbor entry is received within a period of time, the state of the neighbor entry is set to the Stale state; when there is When a packet triggers a neighbor entry in the Stale st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L12/751H04L12/26H04L12/24H04L45/02
Inventor 罗琳
Owner NEW H3C TECH CO LTD
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