Method and apparatus for port state synchronization
A port state and state technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as the inability of the PHY chip to transparently transmit the port state, and the inability to synchronize the port states of the switching devices at both ends.
Active Publication Date: 2016-06-01
KYLAND TECH CO LTD
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Problems solved by technology
This is because in this interface mode, the PHY chip of the switching device at the receiving end of the optical fiber cannot transparently transmit the port status to the MAC chip, and the MAC chip cannot notify the sending end of the switching device to send the fault information to the other switching device. device, the switching device at the other end cannot set the port status of the sending end to the linkdown state, resulting in the inability to synchronize the port status of the switching devices at both ends
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[0037] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0038] A port state synchronization method provided by an embodiment of the present invention is applied to a first switching device.
[0039] In the industrial Ethernet, the optical module inserted into the first switching device is the first optical module, and the optical module inserted into the secon...
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The embodiment of the invention discloses a method and apparatus for port state synchronization. The method is applied to first switching equipment; the first switching equipment is connected with second switching equipment by two fibers; and an output terminal for outputting an LOS signal representing signal loss in a first optical module of the first switching equipment is connected with a complex programmable logic device (CPLD) pin of the first switching equipment. The method comprises: a CPU of first switching equipment obtains an LOS signal of a CPLD pin; when the LOS signal is an abnormal signal, the CPU of the first switching equipment generates fault information; and a sending terminal of the first switching equipment is notified to send the fault information to second switching equipment, so that the second switching equipment sets a port state of the sending terminal to be a link down state. On the basis of the technical scheme provided by the embodiment of the invention, synchronization of port states of the first switching equipment and the second switching equipment can be realized.
Description
technical field [0001] The invention relates to the technical field of industrial Ethernet, in particular to a port state synchronization method and device. Background technique [0002] In industrial Ethernet, the switching device at one end is connected to the switching device at the other end through two optical fibers, and the sending end of the switching device at one end corresponds to the receiving end of the switching device at the other end. When the PHY chip in the switching device and the docking MAC chip are designed as SGMII (Serial Gigabit Media Independent Interface, Serial Gigabit Media Independent Interface) interface mode, the port rate can be forcibly converted from Gigabit to 100M, but auto-negotiation needs to be turned off Features. In this interface mode, the port status of the switching devices at both ends is still normal, but only works at the 100M rate. [0003] However, in this interface mode, when a fiber between the switching devices at both e...
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IPC IPC(8): H04L12/24
CPCH04L41/0631
Inventor 张敏光
Owner KYLAND TECH CO LTD