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arl table management system

A technology for managing system and hardware table items, applied in the field of ARL table management system, it can solve problems such as affecting user services and data, limited rate, packet loss, etc., and achieve the effect of reducing the pressure of maintaining and managing table items

Active Publication Date: 2021-07-27
SHENZHEN FORWARD IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the main control board not only needs to run normal software protocols and be responsible for user configuration delivery, but also needs to update the global ARL table in time and synchronize all table items to each line card. Therefore, when a large number of business flows pass through each line card At this time, there will be a large number of hardware MAC addresses learned and reported to the main control board, so it is easy to cause excessive pressure on the main control board
[0005] In addition, since the main control board uses a shared message channel to each line card and the rate is limited, if the main control board is responsible for synchronizing configuration and entries while exchanging a large number of management messages, it is likely to cause loss. Packet phenomena affect the normal business and data of users

Method used

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Experimental program
Comparison scheme
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Embodiment 1

[0039] This embodiment is applied to a distributed switching device. The distributed switching device includes a single main control board and at least one line card, wherein the single main control board is the main control unit of the entire distributed switching device and is responsible for controlling the entire switching system. It is also responsible for handling various dynamic protocols, etc. The at least one line card may include one or more than two line cards, refer to figure 2 , the ARL table management system of this embodiment is applied to the case of one master control and multiple line cards. Each line card stores an ARL table inside. The information stored in this ARL table is the same as the information in the global ARL table maintained by the main control board, but it no longer exists in the main control board and is centralized by the main control board. Instead, each line card is updated and maintained separately.

[0040] Due to the cancellation of...

Embodiment 2

[0052] Based on the above-mentioned embodiment 1, the ARL table management system provided in this embodiment also proposes to send the table lookup and forwarding process of the layer-3 message to each line card, thereby further reducing the pressure on the main control board to manage table items.

[0053] In the three-layer message forwarding process, the main control board of the present embodiment will query its internally stored software routing table and ARP table (ARP, Address Resolution Protocol, Address Resolution Protocol), wherein the software routing table stores the three-layer switching Detailed information of different network segments, mainly including destination network address / subnet mask, next-hop IP address, outbound interface, and metric value. The ARP table records the mapping relationship between IP addresses and MAC addresses.

[0054] refer to image 3 , the process of forwarding the line card table lookup of the layer-3 packet data in this embodime...

Embodiment 3

[0074] Figure 4 It is a schematic structural diagram of the ARL table management system of the third embodiment of the present invention. The distributed switching device in this embodiment is formed by interconnecting multiple service boards into an independent large-scale distributed switching system, wherein each service board has its own independent A single main control board and at least one line card, and each service board can run independently in single-board mode. For the interconnected distributed switching system of this embodiment, since there are multiple main control boards at the same time, this embodiment will elect a main main control board from the multiple main control boards according to the preset election rules, and the remaining It is used as a standby main control board, and only the active main control board is the control core of the entire system. In addition, if the current active main control board fails or is unavailable, a new active main cont...

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Abstract

The invention discloses an ARL table management system, which is applied to distributed switching equipment. The distributed switching equipment includes a main control board and at least one line card. The system includes: each line card stores an ARL table, and when the line card receives When a message arrives, the line card learns the hardware entry of the message and updates it to the ARL table, and also synchronizes the hardware entry of the connected line card through the communication interface between the line cards; the main control board and each line card establish There is a message channel, and the ARL table is managed and viewed through the message channel. The present invention can update and maintain their respective ARL tables by each line card, cancel the global ARL table managed by the main control board and transfer the search out interface operation of the three-layer data forwarding to each line card, which greatly reduces the burden on the main control board. The maintenance of the board and the pressure of table entry management also improve the stability of the switching system in the case of large traffic flow.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an ARL table management system. Background technique [0002] A distributed switching system usually includes a main control board and multiple line cards. The main control board is the main control unit of the entire switching system, responsible for controlling the entire switching system and processing various dynamic protocols, etc., and the line cards are The line interface card is the physical interface between the switching system and the network. The main control board mainly includes the CPU of the main control board and corresponding management modules, etc., and the line card mainly includes the CPU of the line card and the network processor (NP). Among them, the NPAS (NP application service) component in the line card is used for Provide access to NP hardware and NP microcode to configure hardware structures and maintain forwarding table entries and memory stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/12
CPCH04L61/103
Inventor 张形形
Owner SHENZHEN FORWARD IND CO LTD