WO2016110151A1

WO2016110151A1 - Method and device for detecting link loopback of pon system

Info

Publication number: WO2016110151A1
Application number: PCT/CN2015/093671
Authority: WO
Inventors: 汪万虎; 艾滨; 陈志欣
Original assignee: 烽火通信科技股份有限公司
Priority date: 2015-01-06
Filing date: 2015-11-03
Publication date: 2016-07-14
Also published as: CN104539348B; TR201713827T1; CN104539348A; MY188119A

Abstract

Disclosed are a method and device for detecting link loopback of a PON system. The method comprises: enabling a loopback detection function of a core swap disc, and respectively sending first-level detection messages to all uplink ports and slot ports of all service discs; if the returned first-level detection messages are not received, ending detection; otherwise, confirming that there is loopback in a PON system; if there is loopback between the uplink ports, ending the detection; if there is loopback between the uplink ports and the slot ports or among all the slot ports, enabling loopback detection functions of service cards, each service card respectively sending a second-level detection message to a designated ONU, and if all the service cards do not receive the returned second-level detection message, ending the detection; otherwise, accurately positioning a service card with generated loopback and the designated ONU according to an ONU authorization number carried in the second-level detection message and the slot number of the service card. In the present invention, the implementation process is simple, and a detection result can be reported in time, thereby greatly increasing the efficiency of detecting link loopback of a PON system.

Description

Method and device for link loopback detection of PON system

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for link loopback detection in a PON system.

Background technique

With the development of communication technologies, users accessing broadband are becoming more and more popular. Broadband access devices are connected to the transmission layer device on the network side, and the user side is connected to the user home gateway or DSL (Digital Subscriber Line) modem. The diversity and complexity of user access causes link loopback. For example, users often encounter problems such as not being able to access the network or making phone calls. Most of these problems are caused by loopback in the link of the system. Packets coming in from the uplink port are returned to the device in some way after exiting the optical line terminal, such as in a PON (Passive Optical Network). In the network device, the source MAC (Media Access Control) address of one or more packets exists at one or more ports of the switch chip, so that the switch chip of the core switch disk of the PON device is forwarded. An exception occurred during the text.

At present, the loopback detection technology is generally used to solve the problem of link loopback of the PON device, and the loopback detection function of the PON device is enabled, so that the PON device receives the detection packet sent by itself, and if the PON device receives the return detection within the preset time, If the PON device does not receive the returned detection packet within the preset time, the PON device does not have a link loopback or the link is broken. However, due to the PON, the PON device has a link loopback. The device is a multi-level device. There are many possibilities for the loopback state. Loopback between the uplink ports may occur. Between the PON ports and between the ONUs (Optical Network Units) may even occur. Loopback between OLT (Optical Line Terminal). Therefore, the existing PON system link loopback detection method has the following problems:

(1) Loopback detection requires a large amount of system resources for locating the loopback link;

(2) The implementation process is cumbersome;

(3) The test results cannot be reported in time.

In summary, the existing PON system link loopback detection method is inefficient.

Summary of the invention

The technical problem to be solved by the present invention is that the existing PON system link loopback detection method is less efficient.

In order to solve the above technical problem, the present invention provides a method for link loopback detection of a PON system, including the following steps:

Step 10: Enable the loopback detection function of the core switch disk, and send a level 1 detection packet to each slot of the uplink port and each service disk through the core switch disk.

Step 20: The core switch disc determines whether the first-level detection message returned by the other uplink port or the slot port is received within the preset time. If yes, step 40 is performed; otherwise, step 30 is performed;

Step 30: It is determined that the PON system has no link loopback or the link has been broken, notify the maintenance personnel, and end the detection;

Step 40: It is determined that there is a link loopback between the upper joint port and the upper joint port, between the upper joint port and the slot position, or between the slot ports, and between the upper joint port and the slot position or each slot position. If there is a link loopback between the two, step 50 is performed;

Step 50: Enable the loopback detection function on the service card. Each service card sends a secondary detection packet to the specified ONU. The secondary detection packet contains at least the ONU authorization number of the specified ONU. The slot number of the service card of the level detection packet;

Step 60: Determine whether the service board receives the returned secondary detection packet. If the service card is not received, the link between the service card and the specified ONU does not exist or the link is broken. The service board and the specified ONU of the link loopback are generated based on the ONU authorization number and the slot number of the service card.

The present invention also provides a device for link loopback detection of a PON system, the device comprising:

The first opening unit is configured to enable the loopback detection function of the core switch disk, and send a first-level detection message to each slot of the uplink port and each service disk through the core switch disk;

The first determining unit is configured to determine whether the first-level detection message returned by the other uplink port or the slot port is received within the preset time, and if yes, executing the second determining unit; otherwise, executing the second determining unit; First identification unit;

The first identification unit is configured to determine that the PON system has no link loopback or the link has been broken, notify the maintenance personnel, and end the detection;

The second identification unit is configured to identify a link loopback between the upper joint port and the upper joint port, between the upper joint port and the slot position, or between the slot ports, or between the upper joint port and the slot position If there is a link loopback between the slot ports, the second open unit is executed;

The second opening unit is configured to enable the loopback detection function on the service card, and each of the service boards sends a second detection packet to the designated ONU, where the second detection packet includes at least the ONU authorization of the designated ONU. Number and the slot number of the service card that sends the second-level test packet.

The second determining unit is configured to determine whether the service card receives the returned secondary detection packet. If not, the link between the service card and the specified ONU does not exist or the link is already connected. If the fault is rectified, the detection is terminated. Otherwise, the service card of the link loopback and the specified ONU are generated based on the ONU authorization number and the slot number of the service card.

The invention realizes the link loopback detection of the PON system by means of the core switch disk and the hierarchical check of each service card, occupies less system resources, can quickly locate the link loopback position and generate alarm information, and the implementation process is simple. The detection result can be reported in time, which greatly improves the efficiency of link loopback detection in the PON system.

DRAWINGS

1 is a flowchart of a method for link loopback detection of a PON system according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an apparatus for detecting link loopback of a PON system according to an embodiment of the present invention.

detailed description

The present invention will be described in detail below with reference to the drawings and specific embodiments.

The embodiment of the invention provides a method for link loopback detection of a PON system. As shown in FIG. 1 , the method includes the following steps:

Step 10: Open the network management interface, set the detection parameters of the loopback link, enable the loopback detection function of the core switch disk, and send the level 1 detection packet to the slot ports of each uplink port and each service disk through the core switch disk. .

It should be noted that the Ethernet type in the first-level detection message is set by the user, for example, the type of the Ethernet can be set to Oxeffa.

Step 20: The core switch disc determines whether the first-level detection packet returned by the other uplink port or slot port is received within the preset time. If yes, step 40 is performed; otherwise, step 30 is performed.

In a specific embodiment of the present invention, the main control disk includes 28 ports, 12 of which are connected to the uplink port, and the other 16 ports are connected to the service disk, and the CPU of the main control disk sends the first-level detection packet through the core switching disk. At the same time, the uplink port and the service slot are sent at the same time, so the loopback of the following scenarios is initially located:

a. The first-level detection packet sent from the uplink port is returned from the other uplink port. The link loopback is generated between the uplink port and the uplink port.

b. The first-level detection packet sent from the uplink port is returned from the slot port (the port that is connected to the service card), indicating that the link loop is generated between the uplink port and the slot port.

c. The first-level detection packet sent from the slot interface is returned from the uplink port. The link loopback is generated between the slot port and the uplink port.

If the first-level detection packet sent from the slot is returned from another slot, the link loopback is generated between the slot and the slot.

It should be noted that, in the default mode, the interval at which the CPU sends the detection packet is five minutes. The preset time is the time when the CPU continuously sends the detection packet three times. The preset time can also be other values, which are not limited herein.

Step 30: It is determined that the PON system has no link loopback or the link has been broken, and the maintenance personnel is notified that the system is intact, and the detection is ended.

Step 40: A link loopback is found between the uplink port and the uplink port, between the uplink port and the slot port, or between the slot ports, and the loopback detection information is recorded and alarm information is generated.

In step 40, if it is determined that the link loopback exists between the uplink port and the uplink port, the maintenance result is notified to the maintenance personnel to perform corresponding processing, and then returns to step 10 to continue the detection; otherwise, the description There is a link loopback between the upper port and the slot or between the slots. Go to Step 50.

Step 50: Determine the mode of the virtual local area network according to the service model of the connected device, and enable the loopback detection function on the service card, and each service card sends a secondary detection packet to the designated ONU.

The second-level detection packet contains at least the ONU authorization number of the specified ONU and the slot number of the service card that sends the second-level detection packet.

It should be noted that each service board can send a secondary detection packet to the designated ONU by using the default mode, the specified vlan packet sending mode, or the traversal mode.

Specifically, the default packet sending mode is based on the default VLAN to send the second-level detection packet, and the default vlan is 4088. The specified vlan packet sending mode is to send the second-level detection packet according to the vlan selected by the user; the traversal mode refers to When the service vlan in the PON system is clear, the secondary detection packet is sent from the first vlan to the last vlan.

Step 60: Determine whether the service board receives the returned secondary detection packet. If not, the link between the service card and the specified ONU does not exist or the link is broken. The maintenance personnel detects the result and continues to detect the next service card until the completion of all the service card detection. Otherwise, the ONU authorization number and the slot number of the service card are accurately located according to the second detection packet. The service card of the link loopback and the specified ONU.

After all business boards are inspected, the maintenance personnel are notified to perform maintenance.

In the prior art, loopback detection requires a large amount of system resources for locating the loopback link. The implementation process is cumbersome and the detection result cannot be reported in time. As a result, the link loopback detection method of the PON system is inefficient. Compared with the prior art, the present invention uses the loopback detection function of the core switch disk and the loopback detection function on each service board to hierarchically detect the PON system, occupies less system resources, and can quickly locate the link loopback. The location of the alarm information is generated, and the implementation process is simple, and the detection result can be reported in time, which greatly improves the efficiency of link loopback detection in the PON system.

On the basis of the foregoing method, the embodiment of the present invention further provides a device 20 for link loopback detection in a PON system. As shown in FIG. 2, the device 20 includes:

The first enabling unit 201 is configured to enable the loopback detection function of the core switching disk, and send a first-level detection message to each slot of the uplink port and each service disk through the core switch disk;

The first determining unit 202 is configured to determine, by the core switching disk, whether the other is received by the preset time. The first detection unit returns the first detection unit 204; if yes, the second identification unit 204 is executed; otherwise, the first identification unit 203 is executed;

The first determining unit 203 is configured to determine that the PON system has no link loopback or the link has been broken, notify the maintenance personnel, and end the detection;

The second identification unit 204 is configured to identify a link loopback between the uplink port and the uplink port, between the uplink port and the slot port, or between the slot ports, or between the uplink port and the slot port. If there is a link loopback between the slot ports, the second opening unit 205 is executed;

The second opening unit 205 is configured to enable the loopback detection function on the service card, and each of the service boards sends a second detection packet to the designated ONU, where the second detection packet includes at least the ONU of the designated ONU. The authorization number and the slot number of the service card that sends the second-level detection packet.

The second determining unit 206 is configured to determine whether the service card receives the returned secondary detection packet. If not, the link between the service card and the designated ONU does not exist. If the fault is rectified, the detection is terminated. Otherwise, the service card of the link loopback and the specified ONU are generated based on the ONU authorization number and the slot number of the service card.

The present invention is not limited to the above-described preferred embodiments, and any one skilled in the art should be aware of the structural changes made in the light of the present invention. Any technical solutions having the same or similar to the present invention fall within the protection scope of the present invention.

Claims

A method for link loopback detection in a PON system, comprising the steps of:

Step 10: Enable the loopback detection function of the core switch disk, and send a level 1 detection packet to each slot of the uplink port and each service disk through the core switch disk.

Step 20: The core switch disc determines whether the first-level detection message returned by the other uplink port or the slot port is received within the preset time. If yes, step 40 is performed; otherwise, step 30 is performed;

Step 30: It is determined that the PON system has no link loopback or the link has been broken, notify the maintenance personnel, and end the detection;

Step 40: It is determined that there is a link loopback between the upper joint port and the upper joint port, between the upper joint port and the slot position, or between the slot ports, and between the upper joint port and the slot position or each slot position. If there is a link loopback between the two, step 50 is performed;

Step 50: Enable the loopback detection function on the service card. Each service card sends a secondary detection packet to the specified ONU. The secondary detection packet contains at least the ONU authorization number of the specified ONU. The slot number of the service card of the level detection packet;

Step 60: Determine whether the service board receives the returned secondary detection packet. If the service card is not received, the link between the service card and the specified ONU does not exist or the link is broken. The service board and the specified ONU of the link loopback are generated based on the ONU authorization number and the slot number of the service card.
The method of claim 1 wherein the type of Ethernet in the primary detection message is set by a user.
The method according to claim 1, wherein after determining that there is a link loopback, the loopback detection information is recorded and alarm information is generated.
The method according to claim 1, wherein in step 50, the second detection packet is sent by using a default delivery mode, a specified vlan delivery mode, or an traversal mode.
The method according to claim 4, wherein the default packet sending mode is to send a second-level detection message based on a default vlan, and the specified vlan packet sending mode is to send a second-level detection report according to the vlan selected by the user. The traversal mode refers to the industry in the PON system. When vlan is serviced, the secondary detection packet is sent from the first vlan to the last vlan.
A device for link loopback detection of a PON system, characterized in that the device comprises:

The first opening unit is configured to enable the loopback detection function of the core switch disk, and send a first-level detection message to each slot of the uplink port and each service disk through the core switch disk;

The first determining unit is configured to determine whether the first-level detection message returned by the other uplink port or the slot port is received within the preset time, and if yes, executing the second determining unit; otherwise, executing First identification unit;

The first identification unit is configured to determine that the PON system has no link loopback or the link has been broken, notify the maintenance personnel, and end the detection;

The second identification unit is configured to identify a link loopback between the upper joint port and the upper joint port, between the upper joint port and the slot position, or between the slot ports, or between the upper joint port and the slot position If there is a link loopback between the slot ports, the second open unit is executed;

The second opening unit is configured to enable the loopback detection function on the service card, and each of the service boards sends a second detection packet to the designated ONU, where the second detection packet includes at least the ONU authorization of the designated ONU. Number and the slot number of the service card that sends the second-level test packet.

The second determining unit is configured to determine whether the service card receives the returned secondary detection packet. If not, the link between the service card and the specified ONU does not exist or the link is already connected. If the fault is rectified, the detection is terminated. Otherwise, the service card of the link loopback and the specified ONU are generated based on the ONU authorization number and the slot number of the service card.
The apparatus of claim 6, wherein the type of Ethernet in the primary detection message is set by a user.
The device of claim 6 further comprising:

a recording unit for recording loopback detection information and generating alarm information.
The apparatus according to claim 6, wherein the second opening unit is configured to send a secondary detection message by using a default packet sending mode, a specified vlan packet sending mode, or an traversal mode.
The apparatus according to claim 9, wherein said default delivery mode means Sending a second-level detection packet based on the default vlan, the specified vlan packet sending mode is to send a second-level detection packet according to the vlan selected by the user, where the traversal mode refers to when the service vlan in the PON system is unclear, the second-level detection message The detection message is sent from the first vlan to the last vlan.