Improved single loop redundancy backup implementation based on rapid spanning tree protocol (RSTP)

A redundant backup and single-loop technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as long convergence time, inability to communicate, and short-term inability to communicate in the network

Inactive Publication Date: 2012-10-31
WUHAN MAIWEI SHIDA SOFTWARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first defect: Since the entire switching network will eventually become a spanning tree, it will lead to a longer convergence time when the network scale is relatively large, and the impact of topology changes is also greater
[0005] The second defect: in the case of a symmetrical network structure, the single spanning tree will not cause the network to tempora...

Method used

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  • Improved single loop redundancy backup implementation based on rapid spanning tree protocol (RSTP)
  • Improved single loop redundancy backup implementation based on rapid spanning tree protocol (RSTP)
  • Improved single loop redundancy backup implementation based on rapid spanning tree protocol (RSTP)

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Experimental program
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Embodiment Construction

[0020] specific implementation

[0021] Specific embodiments of the present invention are as follows:

[0022] (1) Create a structure based on standard RSTP. This structure defines the structural content of the BPDU data packet. At the same time, a field identifying the incoming port of the data packet is added to this structure to facilitate the switching of the state of the specific ring port. .

[0023] (2) Create a socket based on standard Ethernet, use this socket to listen to RSTP BPDU packets, and send RSTP BPDU packets. Three parameters used when calling the socket function to create a socket: AF_INET, SOCK_PACKET, 0x7081.

[0024] (3) Scan the port status of the ring port every 10ms. If the ring port is found to be link up, send a link up packet to notify other switches; if the ring port is found to be link down, send a link down packet to notify other switches.

[0025] (4) When the root network device is selected, the last link up port on the root network device ...

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Abstract

The invention discloses improved single loop redundancy backup implementation based on a rapid spanning tree protocol (RSTP). The idea based on loop backup is adopted to thoroughly rewrite the election algorithm and the self-healing algorithm of a root network device of the RSTP. Election of the root network device is limited between switches at two ends after link up of the last ringed network cable, and a group ring port after loop forming is only switched between plugging state and transmitting state, sends RSTP bridge protocol data unit (BPDU) messages only when having connection change and never sends the RSTP BPDU messages after the network is stabilized. Therefore, self-healing time of a looped network can be greatly reduced, and reliability of the network is improved.

Description

[0001] Field [0002] The invention relates to the realization of an RSTP-based improved single-loop redundant backup. In the field of industrial communication, loop redundancy backup has always been a very important topic. Commonly used link redundancy backup methods include port aggregation (TRUNK), loop backup, etc., an improved single-loop redundancy backup based on RSTP is based on the idea of ​​loop backup, based on the standard RSTP protocol , completely rewrite the root bridge election process and the state machine conversion mechanism, so that RSTP only realizes the link redundancy backup function of a single ring, and at the same time greatly shortens the self-healing time of RSTP. After testing, an RSTP-based improved single-loop redundant backup implementation can achieve the effect of four switches forming a single-loop network, and the theoretical self-healing time is controlled at about 15ms, which greatly improves the reliability of the network. technical back...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L12/56
Inventor 周厚明杨志
Owner WUHAN MAIWEI SHIDA SOFTWARE
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