CN116528094A - Device and method for detecting power failure and fiber failure of optical fiber switch - Google Patents

Device and method for detecting power failure and fiber failure of optical fiber switch Download PDF

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Publication number
CN116528094A
CN116528094A CN202310808752.XA CN202310808752A CN116528094A CN 116528094 A CN116528094 A CN 116528094A CN 202310808752 A CN202310808752 A CN 202310808752A CN 116528094 A CN116528094 A CN 116528094A
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optical fiber
power
message
fiber
switch
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曾慧
谭朝茂
戴昊
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Hangzhou Future Technology Co ltd
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Hangzhou Future Technology Co ltd
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Priority to CN202310808752.XA priority Critical patent/CN116528094A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005Switch and router aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005Switch and router aspects
    • H04Q2011/0007Construction
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q2011/0079Operation or maintenance aspects
    • H04Q2011/0081Fault tolerance; Redundancy; Recovery; Reconfigurability
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q2011/0079Operation or maintenance aspects
    • H04Q2011/0083Testing; Monitoring

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Optical Communication System (AREA)

Abstract

The invention discloses a device and a method for detecting power failure and fiber failure of an optical fiber switch, wherein the method for detecting the power failure and the fiber failure of the optical fiber switch comprises the steps that a power failure detection module of a first optical fiber switch detects whether power failure occurs, if the power failure is detected, a control module sends a power failure information message to a second optical fiber switch and network equipment, the control module of the second optical fiber switch monitors whether optical fibers are disconnected, if the second optical fiber switch monitors that the optical fibers are disconnected, whether the power failure information message is received is judged, if the power failure information message is received, the power failure fault is judged, otherwise, the power failure information message is judged to be the fiber failure fault; the control module of the second optical fiber switch encapsulates the power failure fault or the fiber failure into an alarm message, sends the alarm message to network equipment in a network system, realizes link recovery after the first optical fiber switch recovers the fault, rapidly realizes power failure and fiber failure positioning, can realize alarm recovery, and notifies other equipment in the network of the fault.

Description

Device and method for detecting power failure and fiber failure of optical fiber switch
Technical Field
The invention relates to the technical field of network communication, in particular to a device and a method for detecting power failure and fiber failure of an optical fiber switch.
Background
The optical fiber exchanger is a special exchanger for optical fiber communication, and the optical fiber exchanger transmits data through optical fibers to realize data exchange and route control between network devices. When the connection of the optical fiber switch is interrupted, after the optical fiber switch fails, a technician needs to be timely warned and the failure type is checked.
In the ethernet composed of multiple devices, the existing technology for distinguishing power failure and fiber failure cannot transmit fault alarm information to other ethernet devices outside the remote end, and in the network of multiple network management devices, other network management devices cannot obtain the position of the fault device in time. And is single, lacks the signal of verification, is extremely easily disturbed by the outside. Aiming at the problem of how to rapidly and stably distinguish two different fault types of power failure and fiber failure and alarm other devices in the Ethernet, no effective solution is proposed at present.
Disclosure of Invention
In order to overcome the defects of the technology, the invention provides the device and the method for detecting the power failure and the fiber failure of the optical fiber switch, which can rapidly alarm and distinguish the problems of two different failure types of the power failure and the fiber failure, can realize alarm recovery, can also solve the problem that other devices in the Ethernet in the prior art can not acquire the failure alarm, and can enlarge the application scene of the devices.
The technical scheme adopted for overcoming the technical problems is as follows: the invention provides a fiber switch power-down and fiber-down detection device, wherein a fiber switch circuit at least comprises a switch chip and an optical module, and is characterized in that the fiber switch power-down and fiber-down detection device at least comprises a control module coupled with the fiber switch circuit, and a power-down detection module, a fiber-down detection module and a power energy storage module which are respectively coupled with the control module, wherein the input end of the power-down detection module is coupled with an external power supply, and is used for monitoring the state of the external power supply and outputting the state of the power supply to the control module; the input end of the fiber drop detection module is coupled with the optical module and is used for monitoring the optical fiber connection and outputting the optical fiber state to the control module; the control module at least comprises a processor, wherein the processor is respectively coupled with the switching chip and the optical module of the optical fiber switch, and is used for packaging messages based on the detected power state, sending the messages to the network equipment through the switching chip of the optical fiber switch, or receiving the messages from the network equipment and unpacking the messages so as to obtain the power state of the message sending end, further judging whether the message sending end is powered off or fiber-off, and packaging message alarm messages to the network equipment; the input end of the power supply energy storage module is coupled with an external power supply, and the output end of the power supply energy storage module is coupled with the power-down detection module, the exchange chip, the optical module and the control module and is used for supplying power to the power-down detection module, the exchange chip, the optical module and the control module when the external power supply is powered down.
Further, the power failure detection module at least comprises a voltage detector, wherein one pin of the voltage detector is coupled with a GPIO pin of the processor, and the other pin of the voltage detector is coupled with an external power supply for supplying power to a circuit of the optical fiber switch.
Further, the fiber drop detection module detects a connection state of the optical fiber based on the fact that the pin of the processor is coupled with the LOS pin of the optical module.
Further, the power energy storage module at least comprises a first capacitor and a second capacitor, wherein the positive electrode of the first capacitor is coupled with +5V, the negative electrode of the first capacitor is coupled with ground, the positive electrode of the second capacitor is coupled with +3.3V, and the negative electrode of the second capacitor is grounded.
The second aspect of the present invention provides a method for detecting power failure and fiber failure of an optical fiber switch, which is applied to a network system at least comprising two optical fiber switches connected through optical fibers, and a network device connected with the optical fiber switches through ethernet, wherein the optical fiber switch at least comprises the device for detecting power failure and fiber failure of the optical fiber switch, and the method comprises the following steps: the power-down detection module of the first optical fiber switch detects whether power is down, and if the power is detected to be down, the control module sends a power-down information message to the second optical fiber switch and the network equipment; the control module of the second optical fiber exchanger monitors whether the optical fiber is disconnected; if the second optical fiber exchanger monitors that the optical fiber is disconnected, judging whether a power-down information message is received, if the power-down information message is received, judging that the optical fiber is in power-down fault, otherwise, judging that the optical fiber is in power-down fault; and the control module of the second optical fiber switch packages the power failure or the fiber failure into an alarm message and sends the alarm message to network equipment in the network system.
Further, the message formats of the power-down information message and the alarm message are packaged based on a protocol supported by the network equipment.
Further, the control module of the second optical fiber switch also judges whether the received message is matched with the power failure information message, and if not, the received message is discarded.
Further, the method also comprises the steps of recovering the first optical fiber switch from faults, and carrying out power failure and fiber failure detection on the second optical fiber switch.
Further, after the first optical fiber switch recovers from the fault, the second optical fiber switch performs power failure and fiber failure detection, and specifically includes: the first optical fiber switch power failure detection module detects that power supply is normal, and then the first optical fiber switch sends a link recovery message to the second optical fiber switch and network equipment; the control module of the second optical fiber exchanger monitors whether the optical fiber is disconnected; if the second optical fiber exchanger monitors the optical fiber connection and judges whether a link recovery message is received, if the link recovery message is received, the first optical fiber exchanger is judged to be normal, and the second optical fiber exchanger packages the link message and sends the link message to the network equipment.
Further, after the first optical fiber switch recovers from the fault, the second optical fiber switch performs power failure and fiber failure detection, and specifically includes: the first optical fiber switch power failure detection module detects that power supply is normal, and the first optical fiber switch sends a heartbeat message to the second optical fiber switch; and the control module of the second optical fiber switch stores the MAC address of the power-down information message, judges whether the MAC address is matched with the MAC address of the received heartbeat message according to the MAC address of the power-down information message, judges that the first optical fiber switch is powered down and the fiber-down fault is recovered if the MAC address is matched and the control module of the second optical fiber switch monitors that the optical fiber connection is normal, and encapsulates the link recovery message to be sent to the network equipment.
The beneficial effects of the invention are as follows:
1. the two different fault types of fault power failure and fiber failure are rapidly distinguished, and after the equipment is powered down, link fault information is timely sent to multiple equipment in the network, so that alarm to other equipment in the network is realized;
2. the position of the link fault in the network is judged through the message, so that the sharing of link information among multiple devices is realized, and the fault position is conveniently and quickly positioned;
3. the message format of the multi-device communication can be modified according to the supported Ethernet protocol, so that the universality and applicability of the device are enhanced;
4. and the detection after the fault recovery is realized, and the timely recovery of the links after the power failure and the fiber failure recovery is ensured.
Drawings
Fig. 1 is a schematic diagram of a power failure and fiber failure detection device of an optical fiber switch according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a power failure detection module of a fiber switch power failure and fiber failure detection device according to the present invention;
fig. 3 is a schematic circuit diagram of a power energy storage module of a fiber switch power-down and fiber-down detection device according to the present invention;
fig. 4 is a schematic diagram of waveforms of a power supply and a power-down signal in a power-down and power-down detection device of an optical fiber switch according to the present invention;
FIG. 5 is a flowchart of a method for detecting power failure and fiber failure of an optical fiber switch according to the present invention;
fig. 6 is a flowchart of power failure and fiber failure detection of a second optical fiber switch provided by the present invention;
fig. 7 is a schematic diagram of a message format with remote power-down content in a method for detecting power-down and fiber-down of an optical fiber switch according to the present invention.
Detailed Description
The invention will now be described in further detail with reference to the drawings and the specific examples, which are given by way of illustration only and are not intended to limit the scope of the invention, in order to facilitate a better understanding of the invention to those skilled in the art.
Example 1
As shown in fig. 1, the optical fiber switch power-down and fiber-down detection device in this embodiment includes a control module coupled to an optical fiber switch circuit, a power-down detection module, a fiber-down detection module and a power energy storage module coupled to the control module, respectively, where an input end of the power-down detection module is coupled to an external power supply, and is used for monitoring an external power supply state and outputting the power supply state to the control module, and an input end of the fiber-down detection module is coupled to an optical module, and is used for monitoring optical fiber connection and outputting the optical fiber state to the control module; the control module at least comprises a processor, wherein the processor is respectively coupled with the switching chip and the optical module of the optical fiber switch, and is used for packaging messages based on the detected power state, sending the messages to the network equipment through the switching chip of the optical fiber switch, or receiving the messages from the network equipment and unpacking the messages to obtain the power state of the message sending end, further judging whether the message sending end is powered off or fiber-off, and packaging message alarm messages to the network equipment; the input end of the power supply energy storage module is coupled with an external power supply, and the output end of the power supply energy storage module is coupled with the power-down detection module, the exchange chip, the optical module and the control module and is used for supplying power to the power-down detection module, the exchange chip, the optical module and the control module when the external power supply is powered down.
As shown in fig. 2, the schematic circuit diagram of the power-down detection module is shown, and the voltage detector of the power-down detection module selects HT7044.HT7044 pin 1 connects the processor GPIO pin, and diode D1 anodal connection voltage detector pin 2, and the measured power is connected to the negative pole, and resistance R1 connects in parallel with diode D1, and voltage detector pin 3 connects ground.
And the fiber drop detection module is used for connecting the GPIO pin of the processor with the LOS pin of the optical module. The processor detects the connection state of the optical fiber by detecting the LOS pin.
The positive pole of the first capacitor is coupled with +5V, the negative pole is coupled with ground, and the positive pole of the second capacitor is coupled with +3.3V, and the negative pole is grounded. In one embodiment of the invention, as shown in FIG. 3, the +3.3v power supply is connected in parallel with two 22uf capacitances as a first capacitance, and the +5v power supply is connected in parallel with one 330uf, and the two 22uf capacitances as a second capacitance.
When the external power supply is powered down, as shown in fig. 4, the capacitor in the power energy storage module starts to discharge through the first capacitor and the second capacitor, at this time, the discharging voltage of the power supply slowly drops, when the power supply drops to +4.40v, the pin 3OUT of the power-down detection module instantaneously drops from 3.3v to 0v, at this time, the falling edge of the processor is triggered to interrupt, and thus the power-down of the external power supply is detected. When the +3.3v power supply needed by the exchange chip and the processor is reduced to +3.7v, the +5v power supply starts to be reduced, and after the processor, the exchange chip and the optical module are triggered to be interrupted, the transmission work of the message is completed in at least 13.8 ms.
The Ethernet MAC controller peripheral equipment of the processor of the control module is connected with the exchange chip through the RMII interface, the data differential line of the exchange chip is respectively connected with the optical module and the network transformer, the other end of the network transformer is connected with the standard RJ45 interface, and other network equipment is connected with the optical fiber exchanger through the RJ45 interface.
Example 2
The invention discloses a method for detecting power failure and fiber failure of an optical fiber switch, which is applied to a network system at least comprising two optical fiber switches connected through optical fibers, and is used for detecting the power failure and fiber failure based on the device for detecting the power failure and fiber failure of the optical fiber switch, wherein a flow chart is shown in figure 5. The power-down detection module of the first optical fiber switch detects whether power is down, and if the power is detected to be down, the control module sends a power-down information message to the second optical fiber switch and the network equipment; the control module of the second optical fiber exchanger monitors whether the optical fiber is disconnected; if the second optical fiber exchanger monitors that the optical fiber is disconnected, judging whether a power-down information message is received, if the power-down information message is received, judging that the optical fiber is in power-down fault, otherwise, judging that the optical fiber is in power-down fault; and the control module of the second optical fiber switch packages the power failure or the fiber failure into an alarm message and sends the alarm message to network equipment in the network system.
It should be noted that the first fabric switch and the second fabric switch may be a local fabric switch and a remote fabric switch.
In an embodiment of the present invention, a method for detecting power failure and fiber failure of a fiber switch is described by taking power failure of a first fiber switch as an example.
S1, a power failure detection module of a first optical fiber switch detects whether power is lost, and if the power failure is detected, a control module sends a power failure information message to a second optical fiber switch and network equipment.
The external power supply of the first optical fiber switch is powered down, a pin 3OUT of the power-down detection module triggers the falling edge interrupt of the processor of the control module, and the processor packages the message with the power-down content into an Ethernet message with power-down information based on utilizing the LwIP protocol stack. As shown in fig. 7, the OAM message format based on the EFM OAM protocol may be populated with information with power down content in the Data/Pad segment. The ethernet message is transmitted not only to the second optical fiber switch through the optical port, but also to other network devices of the network system, such as network management devices, through the RJ 45. Other network devices judge the position of the link fault in the network through the received message, so that the sharing of link information among multiple devices is realized, and the fault position is conveniently and quickly positioned.
It should be noted that, the message format used for multi-device communication in the present invention may be modified according to the supported ethernet protocol, so as to enhance the versatility and applicability of the device.
S2, a control module of the second optical fiber switch monitors whether the optical fiber is disconnected.
The processor of the control module of the second fabric switch continues whether the LOS leg of the optical module has a falling edge.
And S3, if the second optical fiber exchanger monitors that the optical fiber is disconnected, judging whether a power-down information message is received, if the power-down information message is received, judging that the power-down fault is generated, otherwise, judging that the power-down fault is generated.
As shown in fig. 6, a flowchart of determining whether the second fabric switch is in a power failure or a fiber failure is provided. If the LOS pin of the optical module of the second optical fiber exchanger generates a falling edge, the falling edge interruption of the processor of the control module of the second optical fiber exchanger is triggered, and at the moment, the connection interruption of the optical port needs to be further judged whether the connection interruption is caused by the power failure or the disconnection of the optical fiber line. And if the processor of the second optical fiber switch receives the power-down information message, judging that the first optical fiber switch is a power-down fault. And if the processor of the second optical fiber switch does not receive the power-down information message, judging that the first optical fiber switch is a fiber-down fault.
After the second optical fiber exchanger receives the optical signal, the optical module converts the optical signal into an electrical signal, the electrical signal is transmitted to the exchange chip, the exchange chip converts the differential signal into an Ethernet data frame, the Ethernet data frame is transmitted to the processor through the RMII interface, and the processor unpacks the message through the LwIP protocol stack.
In practical application, if the processor of the second optical fiber switch is in the message receiving state all the time, the processor distinguishes the normal message and the power-down information message through the protocol, if the messages are not matched, the processor discards the message, and the OAM message is used as an example: firstly, comparing a source MAC address with an ARP table, confirming that the source of a message, and judging whether the Data of the subtype Flag Code Data/Pads field are fixed according to the fixed parts, discarding if not, and acquiring and analyzing if not.
And S4, the control module of the second optical fiber switch packages the power failure or the fiber failure into an alarm message and sends the alarm message to network equipment in the network system.
And the second optical fiber switch packages the judged power failure fault or the fiber failure into an alarm message and sends the alarm message to other network equipment, so that the power failure fault or the fiber failure obtained by distinguishing is also alarmed to other equipment.
S5, recovering the fault of the first optical fiber switch, and carrying out power failure and fiber failure detection on the second optical fiber switch.
The method specifically comprises two methods for realizing the fault recovery of the first optical fiber switch, and the second optical fiber switch performs power failure and fiber failure detection judgment.
In one embodiment of the invention, if the power failure detection module of the first optical fiber switch detects that the power supply is normal, the first optical fiber switch sends a link recovery message to the second optical fiber switch and the network equipment, and the control module of the second optical fiber switch monitors whether the optical fiber is disconnected; if the second optical fiber exchanger monitors the optical fiber connection and judges whether a link recovery message is received, if the link recovery message is received, the first optical fiber exchanger is judged to be normal, and the second optical fiber exchanger packages the link recovery message and sends the link recovery message to the network equipment.
In another embodiment of the present invention, if the power failure detection module of the first optical fiber switch detects that the power supply is normal, the first optical fiber switch sends a heartbeat message to the second optical fiber switch; and the control module of the second optical fiber switch stores the MAC address of the power-down information message, judges whether the MAC address is matched with the MAC address of the received heartbeat message according to the MAC address of the power-down information message, judges that the first optical fiber switch is powered down and the fiber-down fault is recovered if the MAC address is matched and the control module of the second optical fiber switch monitors that the optical fiber connection is normal, and encapsulates the link recovery message to the network equipment.
It should be noted that: in other embodiments, the steps of the corresponding method are not necessarily performed in the order shown and described in this specification. In some other embodiments, the method may include more or fewer steps than described in this specification. Furthermore, individual steps described in this specification, in other embodiments, may be described as being split into multiple steps; while various steps described in this specification may be combined into a single step in other embodiments.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for a system or system embodiment, since it is substantially similar to a method embodiment, the description is relatively simple, with reference to the description of the method embodiment being made in part. The system and system embodiments described above are merely illustrative, and some or all of the modules may be selected according to actual needs to achieve the objectives of the present embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.

Claims (10)

1. The optical fiber switch circuit at least comprises a switch chip and an optical module, and is characterized in that the optical fiber switch circuit at least comprises a control module coupled with the optical fiber switch circuit, a power failure detection module, a fiber failure detection module and a power energy storage module respectively coupled with the control module,
the input end of the power failure detection module is coupled with an external power supply, and is used for monitoring the state of the external power supply and outputting the state of the power supply to the control module;
the input end of the fiber drop detection module is coupled with the optical module and is used for monitoring the optical fiber connection and outputting the optical fiber state to the control module;
the control module at least comprises a processor which is respectively coupled with the switching chip of the optical fiber switch and the optical module,
the processor is used for packaging the message based on the detected power state, sending the message to the network equipment through the exchange chip of the optical fiber exchanger, or receiving the message from the network equipment and unpacking the message to obtain the power state of the message sending end, further judging whether the message sending end is powered off or fiber-off, and packaging the message alarm message to the network equipment;
the input end of the power supply energy storage module is coupled with an external power supply, and the output end of the power supply energy storage module is coupled with the power-down detection module, the exchange chip, the optical module and the control module and is used for supplying power to the power-down detection module, the exchange chip, the optical module and the control module when the external power supply is powered down.
2. The fiber optic switch power down and fiber down detection device of claim 1, wherein the power down detection module comprises at least a voltage detector, one pin of the voltage detector being coupled to a GPIO pin of the processor, the other pin being coupled to an external power source for powering a circuit of the fiber optic switch.
3. The device for detecting power failure and fiber failure of a fiber optic switch according to claim 1, wherein the fiber failure detection module detects the connection status of the optical fiber based on a pin of the processor coupled to an LOS pin of the optical module.
4. A fiber optic switch power down and fiber down detection apparatus according to any one of claims 1-3, wherein the power energy storage module comprises at least a first capacitor and a second capacitor, the positive electrode of the first capacitor is coupled to +5v, the negative electrode is coupled to ground, the positive electrode of the second capacitor is coupled to +3.3v, and the negative electrode is grounded.
5. A method for detecting the power failure and the fiber failure of an optical fiber switch, which is applied to a network system at least comprising two optical fiber switches connected through optical fibers and network equipment connected with the optical fiber switches through Ethernet, wherein the optical fiber switch at least comprises the device for detecting the power failure and the fiber failure of the optical fiber switch according to any one of claims 1 to 4,
the power-down detection module of the first optical fiber switch detects whether power is down, and if the power is detected to be down, the control module sends a power-down information message to the second optical fiber switch and the network equipment;
the control module of the second optical fiber exchanger monitors whether the optical fiber is disconnected;
if the second optical fiber exchanger monitors that the optical fiber is disconnected, judging whether a power-down information message is received, if the power-down information message is received, judging that the optical fiber is in power-down fault, otherwise, judging that the optical fiber is in power-down fault;
and the control module of the second optical fiber switch packages the power failure or the fiber failure into an alarm message and sends the alarm message to network equipment in the network system.
6. The method for detecting power failure and fiber failure of a fiber switch according to claim 5, wherein the message formats of the power failure information message and the alarm message are encapsulated based on a protocol supported by a network device.
7. The method for detecting power failure and fiber failure of a fiber switch according to claim 5, wherein the control module of the second fiber switch further judges whether the received message matches the power failure message, and discards the received message if the received message does not match the power failure message.
8. The method for detecting power loss and fiber loss of a fabric switch according to claim 5, further comprising recovering from a failure of the first fabric switch, and performing power loss and fiber loss detection by a second fabric switch.
9. The method for detecting power failure and fiber failure of a fiber switch according to claim 8, wherein after the first fiber switch is failed and recovered, the second fiber switch performs power failure and fiber failure detection, and specifically comprises:
the first optical fiber switch power failure detection module detects that power supply is normal, and then the first optical fiber switch sends a link recovery message to the second optical fiber switch and network equipment;
the control module of the second optical fiber exchanger monitors whether the optical fiber is disconnected;
if the second optical fiber exchanger monitors the optical fiber connection and judges whether a link recovery message is received, if the link recovery message is received, the first optical fiber exchanger is judged to be normal, and the second optical fiber exchanger packages the link message and sends the link message to the network equipment.
10. The method for detecting power failure and fiber failure of a fiber switch according to claim 8, wherein after the first fiber switch is failed and recovered, the second fiber switch performs power failure and fiber failure detection, and specifically comprises:
the first optical fiber switch power failure detection module detects that power supply is normal, and the first optical fiber switch sends a heartbeat message to the second optical fiber switch;
the control module of the second optical fiber exchanger stores the MAC address of the power-down information message and judges whether the MAC address of the power-down information message is matched with the MAC address of the received heartbeat message or not according to the MAC address of the power-down information message,
if the MAC addresses are matched and the control module of the second optical fiber switch monitors that the optical fiber connection is normal, judging that the first optical fiber switch is powered down and the fiber failure is recovered, and packaging a link recovery message by the second optical fiber switch and sending the link recovery message to network equipment.
CN202310808752.XA 2023-07-04 2023-07-04 Device and method for detecting power failure and fiber failure of optical fiber switch Pending CN116528094A (en)

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Application publication date: 20230801