CN102916850B - A kind of computer network loop detecting method - Google Patents
A kind of computer network loop detecting method Download PDFInfo
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- CN102916850B CN102916850B CN201210303513.0A CN201210303513A CN102916850B CN 102916850 B CN102916850 B CN 102916850B CN 201210303513 A CN201210303513 A CN 201210303513A CN 102916850 B CN102916850 B CN 102916850B
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Abstract
The present invention relates to technical field of the computer network, provide a kind of computer network loop detecting method, described method comprises the steps: when detecting that the cpu resource of core switch exhausts, when there is loop in network, the change of the flow of the core switch in local area network, convergence switch and the access switch broadcast data packet received according to receiving port step by step detects, determine the port of existing network network loop fault, thus fix a breakdown fast, recover the normal operating conditions of whole network, improve the efficiency of network operation.
Description
Technical field
The invention belongs to technical field of the computer network, particularly relate to a kind of computer network loop detecting method.
Background technology
Computer is as a conventional instrument, enter into huge numbers of families, computer network (local area network (LAN)) has all been set up in most computers applied environment, in the LAN environment that network size is larger, the usage quantity of switch is often many, these switches are when being interconnected, be easy to by connection error artificially, such as two of a netting twine crystal heads are linked into simultaneously two ports of a switch, thus cause network loop fault, finally in this local area network (LAN), form broadcast storm, cause whole local area network (LAN) to be paralysed.
At present, when Network Search loop fault, all network wire crystal joints of switch are all pulled up, are then up inserted one by one again by the mode that general employing is more clumsy, and check in network whether still have disruption constantly, when being inserted into a netting twine, network interruption occurs again, may have network loop by under this network port of judgement, then, from the switch under this port, search down one by one; The method on this investigation network bad road, spended time is long, and not necessarily accurate, very not science.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of computer network loop detecting method, be intended to solve the mode that prior art provides Network Search loop fault, adopt and all network wire crystal joints of switch are all pulled up, then up insert again one by one, and check the mode whether still having disruption in network constantly, spended time is long, and not necessarily accurate, very unscientific problem.
The embodiment of the present invention is achieved in that a kind of computer network loop detecting method, and computer network loop comprises and being arranged in local area network (LAN) and the core switch, convergence switch and the access switch that communicate to connect successively, and described method comprises the steps:
When detecting that the cpu resource of core switch exhausts, controlling debug terminal and entering core switch debugging mode, the flow of the broadcast data packet that the receiving port of described core switch receives is monitored;
When the receiving port of abnormal core switch appears in the flow monitoring broadcast data packet, control to pull out the described port netting twine occurring the receiving port of abnormal core switch;
When pull out described there is the port netting twine of the receiving port of abnormal core switch after, the network state of the local area network (LAN) after pulling out described port netting twine is monitored, judges that whether the network state of the local area network (LAN) after pulling out described port netting twine normal;
When the network state monitoring local area network (LAN) is still in abnormal state, controlled circulation performs described control debug terminal and enters core switch debugging mode, to the step that the flow of the broadcast data packet that the receiving port of described core switch receives is monitored;
When the network state monitoring local area network (LAN) is recovered normal, control debug terminal and enter convergence switch debugging mode, the flow of the broadcast data packet that the receiving port of convergence switch receives is monitored;
When monitoring broadcast data packet amount and occurring the receiving port of abnormal convergence switch, control to pull out the described port netting twine occurring the receiving port of abnormal convergence switch;
When pull out described there is the port netting twine of the receiving port of abnormal convergence switch after, the network state of the local area network (LAN) after pulling out described port netting twine is monitored, judges that whether the network state of the local area network (LAN) after pulling out described port netting twine normal;
When the network state monitoring local area network (LAN) is still in abnormal state, controlled circulation performs described control debug terminal and enters convergence switch debugging mode, to the step that the described flow converging the broadcast data packet of the receiving port reception exchanged is monitored;
When the network state monitoring local area network (LAN) is recovered normal, control debug terminal and enter access switch debugging mode, the flow of the broadcast data packet that the receiving port of access switch receives is monitored;
When monitoring broadcast data packet amount and occurring the receiving port of abnormal access switch, judge that described receiving port is as network loop port, extracts described port netting twine, again correctly accesses.
As a kind of improved plan, the step that the flow of the broadcast data packet that the described receiving port to described core switch receives is monitored specifically comprises the steps:
Empty the historical traffic data of all receiving ports of described core switch;
Perform the instruction of receiving port information inspection;
According to the instruction of described receiving port information inspection, the flow information data of the broadcast data packet of each receiving port of core switch described in display translation;
According to the flow information data of described display, determine that the receiving port of abnormal core switch appears in the flow of broadcast data packet.
As a kind of improved plan, the step that the flow of the broadcast data packet that the described receiving port to convergence switch receives is monitored specifically comprises the steps:
Empty the historical traffic data of all receiving ports of described convergence switch;
Perform the instruction of receiving port information inspection;
According to the instruction of described receiving port information inspection, the flow information data of the broadcast data packet of each receiving port of convergence switch described in display translation;
According to the flow information data of described display, determine that the receiving port of abnormal convergence switch appears in the flow of broadcast data packet.
As a kind of improved plan, the step that the flow of the broadcast data packet that the described receiving port to access switch receives is monitored specifically comprises the steps:
Empty the historical traffic data of all receiving ports of described access switch;
Perform the instruction of receiving port information inspection;
According to the instruction of described receiving port information inspection, the flow information data of the broadcast data packet of each receiving port of access switch described in display translation;
According to the flow information data of described display, determine that the receiving port of abnormal access switch appears in the flow of broadcast data packet.
In embodiments of the present invention, the change of the flow of the core switch in local area network, convergence switch and the access switch broadcast data packet received according to receiving port step by step detects, determine the port of existing network network loop fault, fix a breakdown, thus the normal operating conditions of the fast whole network of quick-recovery, improve the efficiency of network operation.
Accompanying drawing explanation
Fig. 1 is the realization flow figure of the computer network loop detecting method that first embodiment of the invention provides;
Fig. 2 is the realization flow figure of the computer network loop detecting method that second embodiment of the invention provides;
Fig. 3 is the realization flow figure that the flow of the broadcast data packet that the receiving port to core switch that the embodiment of the present invention provides receives is monitored;
Fig. 4 is the realization flow figure that the flow of the broadcast data packet that the receiving port to convergence switch that the embodiment of the present invention provides receives is monitored;
Fig. 5 is the realization flow figure that the flow of the broadcast data packet that the receiving port to access switch that the embodiment of the present invention provides receives is monitored;
Fig. 6 is the specific implementation example schematic diagram of the computer network loop detecting method that the embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In embodiments of the present invention, the change of the flow of the core switch in local area network, convergence switch and the access switch broadcast data packet received according to receiving port step by step detects, and determines the port of existing network network loop fault.
Fig. 1 shows the realization flow of the computer network loop detecting method that first embodiment of the invention provides, and its concrete step is as described below:
In step S101, when detecting that the cpu resource of core switch exhausts, controlling debug terminal and entering core switch debugging mode, the flow of the broadcast data packet that the receiving port of core switch receives is monitored.
In embodiments of the present invention, the process of monitoring the flow of the broadcast data packet that the receiving port of core switch receives is following provides specific description, does not repeat them here, but not in order to limit the present invention.
In step s 102, when the receiving port of abnormal core switch appears in the flow monitoring broadcast data packet, the port netting twine pulling out the receiving port occurring abnormal core switch is controlled.
In step s 103, when the network state monitoring local area network (LAN) is recovered normal, control debug terminal and enter convergence switch debugging mode, the flow of the broadcast data packet that the receiving port of convergence switch receives is monitored.
The process of herein monitoring the flow of the broadcast data packet that the receiving port of convergence switch receives is following provides specific description, does not repeat them here, but not in order to limit the present invention.
In step S104, when monitoring broadcast data packet amount and occurring the receiving port of abnormal convergence switch, control the port netting twine pulling out the receiving port occurring abnormal convergence switch.
In step S105, when the network state monitoring local area network (LAN) is recovered normal, control debug terminal and enter access switch debugging mode, the flow of the broadcast data packet that the receiving port of access switch receives is monitored.
The process of herein monitoring the flow of the broadcast data packet that the receiving port of access switch receives is following provides specific description, does not repeat them here, but not in order to limit the present invention.
In step s 106, when monitoring broadcast data packet amount and occurring the receiving port of abnormal access switch, judge that receiving port is as network loop port, extracts port netting twine, again correctly accesses.
In embodiments of the present invention, detect step by step core switch, convergence switch and access switch, determine to find out the port occurring network loop fast, this detection method can recover the use of whole network fast, improves network operation efficiency.
Fig. 2 shows the realization flow of the computer network loop detecting method that second embodiment of the invention provides, and its concrete step is as described below:
In step s 201, when detecting that the cpu resource of core switch exhausts, controlling debug terminal and entering core switch debugging mode, the flow of the broadcast data packet that the receiving port of core switch receives is monitored.
In step S202, when the receiving port of abnormal core switch appears in the flow monitoring broadcast data packet, control the port netting twine pulling out the receiving port occurring abnormal core switch.
In step S203, when pull out described there is the port netting twine of the receiving port of abnormal core switch after, the network state of the local area network (LAN) after pulling out described port netting twine is monitored.
In step S204, judging that whether the network state of the local area network (LAN) after pulling out described port netting twine is normal, be perform step S205, otherwise controlled circulation performs step S201.
In embodiments of the present invention, this controlled circulation process exists in same local area network (LAN), may there is the situation of other one or more network loops.
In step S205, when the network state monitoring local area network (LAN) is recovered normal, control debug terminal and enter convergence switch debugging mode, the flow of the broadcast data packet that the receiving port of convergence switch receives is monitored.
In step S206, when monitoring broadcast data packet amount and occurring the receiving port of abnormal convergence switch, control the port netting twine pulling out the receiving port occurring abnormal convergence switch.
In step S207, when after the port netting twine pulling out the receiving port occurring abnormal convergence switch, the network state of the local area network (LAN) after pulling out port netting twine is monitored.
In step S208, judging that whether the network state of the local area network (LAN) after pulling out port netting twine is normal, be perform step S209, otherwise controlled circulation performs step S205.
In embodiments of the present invention, this controlled circulation process exists in same local area network (LAN), may there is the situation of other one or more network loops.
In step S209, when the network state monitoring local area network (LAN) is recovered normal, control debug terminal and enter access switch debugging mode, the flow of the broadcast data packet that the receiving port of access switch receives is monitored.
In step S210, when monitoring broadcast data packet amount and occurring the receiving port of abnormal access switch, judge that receiving port is as network loop port, extracts port netting twine, again correctly accesses.
Above are only a specific embodiment of the present invention, at this not in order to limit the present invention.
The realization flow that the flow of the broadcast data packet that the receiving port to core switch that Fig. 3 shows the embodiment of the present invention to be provided receives is monitored, its concrete step is as described below:
In step S301, empty the historical traffic data of all receiving ports of core switch.
In embodiments of the present invention, when debug terminal performs this step, can under the debugging mode of debug terminal, input is as given an order:
Switch#clear countes；
Can certainly be other instructions, at this not in order to limit the present invention.
In step s 302, the instruction of receiving port information inspection is performed.
In embodiments of the present invention, under the prerequisite of clear history data, under the debugging mode of debug terminal, perform the instruction of receiving port information inspection, it specifically can with reference to following instruction code mode:
show interfaces g3/1|in broadcasts
show interfaces g3/2|in broadcasts
show interfaces g3/3|in broadcasts
show interfaces g3/4|in broadcasts
show interfaces g3/5|in broadcasts
show interfaces g3/6|in broadcasts
show interfaces g3/7|in broadcasts
show interfaces g3/8|in broadcasts
……
In step S303, according to the instruction of receiving port information inspection, the flow information data of the broadcast data packet of each receiving port of core switch described in display translation.
In embodiments of the present invention, after performing the instruction of above-mentioned receiving port information inspection, under debugging mode interface, show corresponding data code, it specifically can reference:
show interfaces g3/1|in broadcasts
Received 1430563 broadcasts(1428968multicast)
show interfaces g3/2|in broadcasts
Received 1099478 broadcasts(1090171 multicast)
show interfaces g3/3|in broadcasts
Received 611052593 broadcasts(611048869 multicast)
show interfaces g3/4|in broadcasts
Received 1051839 broadcasts(1048838 multicast)
show interfaces g3/5|in broadcasts
Received 15395 broadcasts(0 multicast)
show interfaces g3/6|in broadcasts
Received 0 broadcasts(0 multicast)
show interfaces g3/7|in broadcasts
Received 2537 broadcasts(0 multicast)
show interfaces g3/8|in broadcasts
Received 3713 broadcasts(0 multicast)
……
In step s 304, according to the flow information data of display, determine that the receiving port of abnormal core switch appears in the flow of broadcast data packet.
In this embodiment, being shown from above-mentioned display interface, may there is network loop in the G3/3 port of core switch.
Above are only a concrete example of the present invention, at this not in order to limit the present invention.
The realization flow that the flow of the broadcast data packet that the receiving port to convergence switch that Fig. 4 shows the embodiment of the present invention to be provided receives is monitored, its concrete step is as described below:
In step S401, empty the historical traffic data of all receiving ports of convergence switch.
In embodiments of the present invention, when debug terminal performs this step, can under the debugging mode of debug terminal, input is as given an order:
Switch#clear countes；
Can certainly be other instructions, at this not in order to limit the present invention.
In step S402, perform the instruction of receiving port information inspection.
In embodiments of the present invention, under the prerequisite of clear history data, under the debugging mode of debug terminal, perform the instruction of receiving port information inspection, it specifically can with reference to following instruction code mode:
show interfaces g0/1|in broadcasts
show interfaces g0/2|in broadcasts
show interfaces g0/3|in broadcasts
show interfaces g0/4|in broadcasts
show interfaces g0/5|in broadcasts
show interfaces g0/6|in broadcasts
show interfaces g0/7|in broadcasts
show interfaces g0/8|in broadcasts
……
In step S403, according to the instruction of receiving port information inspection, the flow information data of the broadcast data packet of each receiving port of display translation convergence switch.
In embodiments of the present invention, after performing the instruction of above-mentioned receiving port information inspection, under debugging mode interface, show corresponding data code, it specifically can reference:
show interfaces g0/1|in broadcasts
Received 1430563 broadcasts(1428968 multicast)
show interfaces g0/2|in broadcasts
Received 1099478 broadcasts(1090171 multicast)
show interfaces g0/3|in broadcasts
Received 611052593 broadcasts(611048869 multicast)
show interfaces g0/4|in broadcasts
Received 1051839 broadcasts(1048838 multicast)
show interfaces g0/5|in broadcasts
Received 15395 broadcasts(0 multicast)
show interfaces g0/6|in broadcasts
Received 0 broadcasts(0 multicast)
show interfaces g0/7|in broadcasts
Received 2537 broadcasts(0 multicast)
show interfaces g0/8|in broadcasts
Received 3713 broadcasts(0 multicast)
……
In step s 404, according to the flow information data of display, determine that the receiving port of abnormal convergence switch appears in the flow of broadcast data packet.
In this embodiment, being shown from above-mentioned display interface, may there is network loop in the G0/3 port of convergence switch.
Above are only a concrete example of the present invention, at this not in order to limit the present invention.
The realization flow that the flow of the broadcast data packet that the receiving port to core switch that Fig. 5 shows the embodiment of the present invention to be provided receives is monitored, its concrete step is as described below:
In step S501, empty the historical traffic data of all receiving ports of access switch.
In embodiments of the present invention, when debug terminal performs this step, can under the debugging mode of debug terminal, input is as given an order:
Switch#clear countes；
Can certainly be other instructions, at this not in order to limit the present invention.
In step S502, perform the instruction of receiving port information inspection.
In embodiments of the present invention, under the prerequisite of clear history data, under the debugging mode of debug terminal, perform the instruction of receiving port information inspection, it specifically can with reference to following instruction code mode:
show interfaces f0/1|in broadcasts
show interfaces f0/2|in broadcasts
show interfaces f0/3|in broadcasts
show interfaces f0/4|in broadcasts
show interfaces f0/5|in broadcasts
show interfaces f0/6|in broadcasts
show interfaces f0/7|in broadcasts
show interfaces f0/8|in broadcasts
……
In step S503, according to the instruction of receiving port information inspection, the flow information data of the broadcast data packet of each receiving port of display translation access switch.
In embodiments of the present invention, after performing the instruction of above-mentioned receiving port information inspection, under debugging mode interface, show corresponding data code, it specifically can reference:
show interfaces f0/1|in broadcasts
Received 1430563 broadcasts(1428968 multicast)
show interfaces f0/2|in broadcasts
Received 1099478 broadcasts(1090171 multicast)
show interfaces f0/3|in broadcasts
Received 611052593 broadcasts(611048869 multicast)
show interfaces f0/4|in broadcasts
Received 1051839 broadcasts(1048838 multicast)
show interfaces f0/5|in broadcasts
Received 15395 broadcasts(0 multicast)
show interfaces f0/6|in broadcasts
Received 0 broadcasts(0 multicast)
show interfaces f0/7|in broadcasts
Received 2537 broadcasts(0 mult icast)
show interfaces f0/8|in broadcasts
Received 3713 broadcasts(0 mult icast)
……
In step S504, according to the flow information data of display, determine that the receiving port of abnormal access switch appears in the flow of broadcast data packet.
In this embodiment, being shown from above-mentioned display interface, may there is network loop in the F0/3 port of access switch.
Above are only a concrete example of the present invention, at this not in order to limit the present invention.
For the ease of understanding, followingly providing concrete example, the technical scheme of the embodiment of the present invention is described, but it be not in order to limiting the present invention:
Refer to Fig. 6, suppose that port E and the port F of access switch 2 are connected together mutually, define loop, in such cases, access switch 2 carries broadcast data packet by port D to convergence switch at short notice, convergence switch carries broadcast data packet by port B to core switch, simultaneously, access switch 2 passes through port D to other in same local area network (LAN) with layer access switch (1, 3, ... .) conveying broadcast data packet, after the CPU of core switch receives broadcast data packet, just this broadcast data packet is processed, until the resource exhaustion of core switch, the local area network (LAN) at core switch place is in paralyzed state,
When detecting that the cpu resource of core switch exhausts, control debug terminal and enter core switch debugging mode, the flow of the broadcast data packet that the receiving port of core switch receives is monitored, monitoring within a certain period of time, the flow of the broadcast data packet received, when the flow of the broadcast data packet that certain port (being assumed to be A) of core switch receives super many time, then this port A is extracted from core switch;
After extracting the netting twine of port A, whether the local area network (LAN) at monitoring core switch place is in normal condition;
Continue to control debug terminal and enter convergence switch debugging mode, the flow of the broadcast data packet that the receiving port of convergence switch receives is monitored, monitoring within a certain period of time, the flow of the broadcast data packet received, when the flow of the broadcast data packet that certain port (being assumed to be C) of convergence switch receives super many time, then this port C is extracted from convergence switch;
Otherwise return and continue to monitor the flow of the broadcast data packet that the receiving port of core switch receives;
After extracting the netting twine of port C, whether the local area network (LAN) at monitoring convergence switch place is in normal condition;
Continue to control debug terminal and enter access switch debugging mode, the flow of the broadcast data packet that the receiving port of access switch 2 receives is monitored, monitoring within a certain period of time, the flow of the broadcast data packet received, when the flow of the broadcast data packet that certain port (being assumed to be E) of access switch 2 receives super many time, then judge that this port E is as loop fault point, extracted from access switch 2 by the netting twine of this port E, the loop that port E and port F is formed is removed.
Otherwise return and continue to monitor the flow of the broadcast data packet that the receiving port of convergence switch receives.
In embodiments of the present invention, the above-mentioned wherein a kind of situation only provided, when in a local area network (LAN), when there is multiple loop, its detection mode, with above-mentioned identical, does not repeat them here, but not in order to limit the present invention.
In embodiments of the present invention, the change of the flow of the core switch in local area network, convergence switch and the access switch broadcast data packet received according to receiving port step by step detects, determine the port of existing network network loop fault, fix a breakdown, thus the normal operating conditions of the fast whole network of quick-recovery, improve the efficiency of network operation.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a computer network loop detecting method, is characterized in that, computer network loop comprises and being arranged in local area network (LAN) and the core switch, convergence switch and the access switch that communicate to connect successively, and described method comprises the steps:
When detecting that the cpu resource of core switch exhausts, controlling debug terminal and entering core switch debugging mode, the flow of the broadcast data packet that the receiving port of described core switch receives is monitored;
When the receiving port of abnormal core switch appears in the flow monitoring broadcast data packet, control to pull out the described port netting twine occurring the receiving port of abnormal core switch;
When pull out described there is the port netting twine of the receiving port of abnormal core switch after, the network state of the local area network (LAN) after pulling out described port netting twine is monitored, judges that whether the network state of the local area network (LAN) after pulling out described port netting twine normal;
When the network state monitoring local area network (LAN) is still in abnormal state, controlled circulation performs described control debug terminal and enters core switch debugging mode, to the step that the flow of the broadcast data packet that the receiving port of described core switch receives is monitored;
When the network state monitoring local area network (LAN) is recovered normal, control debug terminal and enter convergence switch debugging mode, the flow of the broadcast data packet that the receiving port of convergence switch receives is monitored;
When monitoring broadcast data packet amount and occurring the receiving port of abnormal convergence switch, control to pull out the described port netting twine occurring the receiving port of abnormal convergence switch;
When pull out described there is the port netting twine of the receiving port of abnormal convergence switch after, the network state of the local area network (LAN) after pulling out described port netting twine is monitored, judges that whether the network state of the local area network (LAN) after pulling out described port netting twine normal;
When the network state monitoring local area network (LAN) is still in abnormal state, controlled circulation performs described control debug terminal and enters convergence switch debugging mode, to the step that the described flow converging the broadcast data packet of the receiving port reception exchanged is monitored;
When the network state monitoring local area network (LAN) is recovered normal, control debug terminal and enter access switch debugging mode, the flow of the broadcast data packet that the receiving port of access switch receives is monitored;
When monitoring broadcast data packet amount and occurring the receiving port of abnormal access switch, judge that described receiving port is as network loop port, extracts described port netting twine, again correctly accesses.
2. computer network loop detecting method according to claim 1, is characterized in that, the step that the flow of the broadcast data packet that the described receiving port to described core switch receives is monitored specifically comprises the steps:
Empty the historical traffic data of all receiving ports of described core switch;
Perform the instruction of receiving port information inspection;
According to the instruction of described receiving port information inspection, the flow information data of the broadcast data packet of each receiving port of core switch described in display translation;
According to the flow information data of described display, determine that the receiving port of abnormal core switch appears in the flow of broadcast data packet.
3. computer network loop detecting method according to claim 1, is characterized in that, the step that the flow of the broadcast data packet that the described receiving port to convergence switch receives is monitored specifically comprises the steps:
Empty the historical traffic data of all receiving ports of described convergence switch;
Perform the instruction of receiving port information inspection;
According to the instruction of described receiving port information inspection, the flow information data of the broadcast data packet of each receiving port of convergence switch described in display translation;
According to the flow information data of described display, determine that the receiving port of abnormal convergence switch appears in the flow of broadcast data packet.
4. computer network loop detecting method according to claim 1, is characterized in that, the step that the flow of the broadcast data packet that the described receiving port to access switch receives is monitored specifically comprises the steps:
Empty the historical traffic data of all receiving ports of described access switch;
Perform the instruction of receiving port information inspection;
According to the instruction of described receiving port information inspection, the flow information data of the broadcast data packet of each receiving port of access switch described in display translation;
According to the flow information data of described display, determine that the receiving port of abnormal access switch appears in the flow of broadcast data packet.
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| CN106549820A (en) | 2015-09-23 | 2017-03-29 | 阿里巴巴集团控股有限公司 | Recognize method, device, flow cleaning equipment and the system of network loop |
| CN106973012A (en) * | 2017-05-22 | 2017-07-21 | 商洛学院 | A kind of computer network loop detecting method |
| CN107707420B (en) * | 2017-08-04 | 2021-04-09 | 郑州云海信息技术有限公司 | Method for testing network cable plugging and unplugging stability |
| CN112769667B (en) * | 2021-01-14 | 2022-07-19 | 北京星网锐捷网络技术有限公司 | Loop protection control method and device for multi-device cascade communication network |
| CN112887147A (en) * | 2021-01-28 | 2021-06-01 | 广东昆仑信息科技有限公司 | Switch monitoring method and device, computer equipment and storage medium |
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