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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, 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: 2015-06-03
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

Disclosed are a device and method for processing a router neighbor discovery (ND) entry. The device comprises: a microcode forwarding module, for counting the number of times an ND entry is used when using said ND entry to carry out packet forwarding; a forwarding list management module, for providing the ND entry count to an ND protocol module; the ND protocol module, for reading and totaling, by means of the forwarding list management module, the ND entry count for each line card once an ND entry becomes stale and, after the window of time during which an ND entry is stale, reading and totaling again the ND entry count for each line card, then comparing the before and after totals of the two ND entry readings, and if the totals of the two ND readings are identical, then allowing the ND entry to be aged out and deleted. The present invention helps to avoid large losses of packets in the forwarding traffic arising from the lack of ND entries caused by said entries aging out, thus ensuring the normal operation of a router.

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 Patents(China)
IPC IPC(8): H04L12/757
CPCH04L45/02
Inventor 李洪涛金飞蔡
Owner ZTE CORP
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