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Device and method for processing neighbor discovery items of router

A technology of neighbor discovery and neighbor discovery protocol, applied in the field of data communication, it can solve the problems of packet loss and occupation of forwarding traffic, and achieve the effect of ensuring normal operation and avoiding a large number of packet loss.

Active Publication Date: 2011-08-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods have obvious limitations, which will cause some unused ND entries to exist for a long time, occupying limited ND table resources, and seriously causing subsequent new forwarding traffic to lose a lot of packets because there are no ND entries

Method used

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  • Device and method for processing neighbor discovery items of router
  • Device and method for processing neighbor discovery items of router
  • Device and method for processing neighbor discovery items of router

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0042] The implementation method includes the following steps:

[0043] S401, when the microcode forwarding module uses the ND entry to forward the message, count the use of the ND entry;

[0044] It should be noted that the accumulation of the count here is not limited to using the ND entry to forward one packet each time, and it can also be in other forms, using the ND entry to forward two or more packets, and using the count to accumulate once;

[0045] S402, when the state of the ND entry becomes stale, the ND protocol module reads and accumulates the usage count corresponding to the ND entry of each line card through the forwarding table management module, and the accumulated result is stored in the ND entry, and this result can also be stored in the user interface display;

[0046] S403, the ND protocol module reads and accumulates the usage count corresponding to the ND entry of each line card through the forwarding table management module again before the stale state ...

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Abstract

The invention relates to a device for processing the neighbor discovery (ND) item of a router, which comprises a microcode transmission module, a transmission table management module and an ND protocol module, wherein the microcode transmission module is used for counting the used times of the ND item when transmitting a message through the neighbor discovery item; the transmission table management module is used for providing the count number of the ND item for the ND protocol module; the ND protocol module is used for reading and accumulating the count number of the ND item of each line card through the transmission table management module when the ND item is just changed into a stale state, and reading and accumulating the count number of the ND item of each line card again after the ND item is kept in the stale state for a specific time, wherein the accumulated results of the ND item read in two times are compared, and the ND item is aged and deleted if the accumulated results of the ND item read in two times are the same. Moreover, the invention further provides a method for processing the ND item of a router. Through the technical scheme of the invention, the normal aging for the ND item is ensured, and packet loss is avoided.

Description

technical field [0001] The invention relates to the field of data communication, in particular to a device and method for processing router neighbor discovery entries. Background technique [0002] With the increasing depletion of IPv4 addresses, a large number of IPv6 network deployments are gradually put on the agenda. In the IPv6 protocol, ND (Neighbor Discovery, Neighbor Discovery) protocol is a brand new protocol, which implements IPv4 ARP (Address Resolution Protocol) , ICMP (Control Message Protocol), all the functions of the router discovery part and the redirection part, and has a neighbor unreachable detection mechanism. When an IPv6 node appears on the network, other IPv6 nodes on the directly connected link can discover it through the ND protocol, and then obtain its link layer address. The relationship table between IPv6 addresses and link-layer addresses in an IPv6 node is called a neighbor entry, or ND entry for short. Generally, it has three basic fields: IP...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56
CPCH04L45/02H04L12/56
Inventor 李洪涛金飞蔡
Owner ZTE CORP
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