Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Loop-back detecting and inhibiting method of Ethernet exchanger chip port

A switch chip, loopback detection technology, applied in the field of data communication

Inactive Publication Date: 2009-11-18
湖北伟天通讯技术有限公司
View PDF0 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the 2-wire port (6) is suspended or the circuit impedance does not match for some reason, the signal sent back to the P0 port by the RX line pair is strong, which will cause the P0 port to receive the data frame or online signal sent by itself. It causes the de facto self-loopback of the P0 port

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Loop-back detecting and inhibiting method of Ethernet exchanger chip port
  • Loop-back detecting and inhibiting method of Ethernet exchanger chip port
  • Loop-back detecting and inhibiting method of Ethernet exchanger chip port

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The loopback detection circuit 7 in the present invention can be realized by a single-chip microcomputer or a programmable logic device. To illustrate the specific implementation, Figure 5 It is a schematic block diagram of a circuit for implementing the present invention taking a 5-port switch chip as an example. An interface of the loopback detection control circuit 7 is connected to the MII interface of the P4 port of a communication port of the switch chip 9, and can communicate with the MII interface specification, and can send frames to the P4 port of the switch chip 9 and receive frames from the P4 port. At the same time, another interface of the loopback detection circuit 7 is connected to the management interface SMI port of the switch chip 9 for configuring the internal parameters of the switch chip 9 and reading internal parameters. In this embodiment, although the loopback detection control circuit 7 is connected to the P4 port and uses the MII interface to comm...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a loop-back detecting and inhibiting method of an Ethernet exchanger chip port, belonging to the technical field of data communication. The method solves the problem that communication fault happens when loop back occurs on the port because a port of an Ethernet exchanger chip is wrongly connected to an external cable or other reasons. The technical scheme is as follows:: a loop-back detection circuit is designed outside the external chip; one interface of a control circuit is connected to a management interface of the exchanger chip and the other interface is connected to a communication port of the exchanger chip; the loop-back detection circuit transmits a data frame of special content to the communication port regularly, receives and analyzes the frame content at the port, determines that loop-back occurs at the port of the exchanger chip when the frame of the special content transmitted by the port is received, analyzes the loop-back path according to the configuration of the exchanger and the frame content, and then closes the compulsory loop-back circuit of the exchanger chip. The invention avoids the communication fault as related ports that produce loop-back are determined.

Description

Technical field [0001] The invention relates to the technical field of data communication, and is a method for judging whether each port of an Ethernet switch chip has loopback, and solving the communication failure caused by the loopback of the switch chip port. Background technique [0002] With the development of the network, the application of Ethernet switches (hereinafter referred to as switches) is very common. Switches are not only used in office and home LANs, but also broadband access in the form of Ethernet has become one of the most economical ways of Internet broadband access. [0003] The switch is composed of a switch chip (or a switch chip set) and auxiliary circuits. Each chip manufacturer has detailed circuit information. The port of the switch chip will not loop back under normal application conditions, but if the external cable is connected incorrectly or for other special reasons, once the port loops back, it will likely cause extremely serious consequences. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L12/24
Inventor 田成吴越峰
Owner 湖北伟天通讯技术有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com