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Network system

A network system and network technology, applied in the field of network systems with redundant structures, can solve problems such as network system failures, and achieve the effects of improving fault tolerance, improving redundancy, and simple structure

Inactive Publication Date: 2016-06-01
QINGDAO JINXUN NETWORK ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, if a loop is formed in the network due to redundancy, when a broadcast frame is transmitted, the broadcast frame repeats the loop, and eventually the communication band is used up, causing the network system to fail

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0017] The network system of the present embodiment includes a trunk network and two subnets connected to the trunk network. The trunk network consists of switching devices. The sub-networks include switching devices. This sub-network is a linear network in which each switching device is arranged linearly (also referred to as a chain). The switch device is an Ethernet (registered trademark) switch. In addition, the switch devices constituting the trunk network are not limited to two. Alternatively, three or more switching devices may constitute a trunk network. Likewise, the number of switch devices constituting the subnet is not limited to three.

[0018] The switch devices located at both ends of the linear network include physical ports as endpoints of the linear network, the physical ports on the endpoint side of the switch device are connected to the physical ports of the switch device, and the physical ports on the end point side of the switch device are connected to...

Embodiment approach 2

[0030]In the network system of the present embodiment, the trunk network of the network system described in Embodiment 1 is replaced with a trunk network. In this embodiment, only the parts different from Embodiment 1 will be described.

[0031] Trunk Network A switching device is added to the trunk network included in the network system according to the first embodiment. The switching devices are connected to the switching devices and the switching devices, and a loop is formed by the switching devices of the trunk network. These switch devices correspond to the Ethernet ring protocol, and even if a switch device constituting the trunk network fails, transmission of the trunk network other than the failed switch can be maintained.

[0032] The switch device disconnects when a packet of a specific logical port number (for example, 4000) is transmitted from the subnet side. In addition, the other party passes only packets from the trunk network to a specific logical port numb...

Embodiment approach 3

[0035] In the network system of the present embodiment, the trunk network of the network system described in Embodiment 1 is replaced with the trunk network a. In this embodiment, only the parts different from Embodiment 1 will be described.

[0036] In the trunk network a, the switch devices 1 and 2 of the trunk network included in the network system according to the first embodiment are replaced with the switch devices 1 a and 2 a. The connection relationship between the switching devices 1 a and 2 a is the same as that of the switching devices 1 and 2 in the first embodiment. In addition, the connection relationship between the trunk network a and the subnetwork is the same as the connection relationship between the trunk network and the subnetwork in the first embodiment.

[0037] In the network system of the present embodiment, the switching devices 1a and 2a connected to the sub-networks have the functions described later (a function to pass or cut off a specific packet...

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PUM

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Abstract

The invention provides a network system. The network system is provided with a trunk network configured by combining multiple switch devices, and a sub-network configured from multiple linearly connected switch devices, with the switch devices positioned on the two connecting ends of the linear shape being connecting to the trunk network. Of all the physical ports equipped on the switch devices configuring the trunk network, a first physical port, which is one of the two physical ports to which the sub-network is connected, blocks packets of a specific logic port number arriving from a specific direction and allows other packets to pass, and a second physical port, which is the other of the above two physical ports, allows packets of a specific logic port number arriving from a specific direction to pass and blocks other packets.

Description

technical field [0001] The present invention relates to a network system of redundant structure. Background technique [0002] In order to improve the availability of the network, the redundancy of the network is generally carried out. Here, redundancy refers to additionally securing network devices and network lines and making them stand by as a backup system. In the event of a failure of a network device or network line in operation, it can continue to operate without causing a network failure by switching to a standby system. Redundant network systems are widely used. [0003] In the case of making the network redundant in this way, although availability can be improved, it is necessary to appropriately perform redundancy. That is, if a loop is formed in the network due to redundancy, when a broadcast frame is transmitted, the broadcast frame repeats the loop, and eventually the communication band is used up, causing the network system to fail. This phenomenon is call...

Claims

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Application Information

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IPC IPC(8): H04L12/705H04L45/18
Inventor 李东
Owner QINGDAO JINXUN NETWORK ENG
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