WO2013159450A1

WO2013159450A1 - Ethernet port loopback detection method and apparatus

Info

Publication number: WO2013159450A1
Application number: PCT/CN2012/077839
Authority: WO
Inventors: 郭红燕; 朱柳辉; 靳海燕
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-04-27
Filing date: 2012-06-29
Publication date: 2013-10-31
Also published as: RU2605494C2; RU2014147780A; CN103378998A

Abstract

Disclosed are an Ethernet port loopback detection method and apparatus. The method comprises: a network device periodically sending a detection message from each port; judging whether the received detection message is a detection message which is sent locally, and if yes, resolving a port number for sending the detection message from the detection message and closing the port link; otherwise, forwarding the detection message to a next network device. The present invention is applied to effectively solve the problem of network paralysis caused by network looping.

Description

The present invention relates to the field of communications, and in particular, to a method and an apparatus for detecting loopback of an Ethernet port. In the existing networking, the network may have a loop in the networking. If a loop exists in the network, after a network device sends a packet, the packets may be sent. After being forwarded by other network devices, the device returns to the network device, and the network device forwards the packets that have been sent by the network device again, and cycles back and forth, eventually exhausting the network bandwidth, making the link impossible. Normal communication, if it is serious, the network will be paralyzed. SUMMARY OF THE INVENTION The present invention provides a method and apparatus for detecting loopback of an Ethernet port, so as to prevent the network from being looped and causing network congestion. According to an aspect of the present invention, a method for detecting an Ethernet port loopback is provided. The method includes the following steps: The network device periodically sends a detection packet from each port; and determines whether the received detection packet is sent locally. If the packet is detected, the port number of the detection packet is parsed from the detection packet, and the port link is closed; otherwise, the detection packet is forwarded to the next network device. Preferably, the method further includes the following steps: setting a protocol type of the detection packet for the network device in advance; and generating, by the network device, the detection packet according to the foregoing setting. Preferably, after setting the protocol type for the detection packet, the foregoing method further performs the following steps: setting a VLAN (Virtual Local Area Network) mode for detecting the packet for the network device. Preferably, the foregoing detection message includes an Ethernet type, a source MAC (Medium/Media Access Control) address, a port number, and a keyword information field. Preferably, the network device generates a loopback alarm and reports the link link. Preferably, after the network device is shut down, the network device performs the following steps: opening the port link timer; determining whether the port link timer is up, if yes, enabling the port link and generating loopback recovery The alarm is reported and reported. Preferably, the above method disables the port link by disabling the MAC address learning function of the port; and enables the port link by enabling the MAC address learning function of the port. Preferably, the loopback alarm and the loopback recovery alarm include a network device number and a port number. Preferably, the detection message is a broadcast packet. Preferably, the network device determines, according to the source MAC address field in the received detection packet, whether the detection packet is a locally sent detection packet. According to another aspect of the present invention, an Ethernet port loopback detection apparatus is provided, including a detection packet sending module and a detection packet receiving module. The detection packet sending module is configured to periodically generate a detection packet. And sending out from each port of the network device; the detection packet receiving module is configured to determine whether the network device receives the detection packet is a locally sent detection packet, and the detection packet is sent locally by the detection packet. When the detection packet is not the local detection packet, the detection packet is forwarded to the next network. device. Preferably, the device further includes a port link timer and a setting module, where the port link timer is set to a time length of the timed port link; the setting module is configured to provide a user with a protocol type for setting the detection message, The VLAN mode, the sending period, and the interface duration of the port link timer described above, and save the user settings. Preferably, the detection packet receiving module is configured to generate a loopback alarm and report the same; and after the port link is closed, the port link timer is enabled, and after the port link timer expires, the port is opened. A link is generated and a loopback recovery alarm is generated and reported. The invention detects the packet and determines whether the loopback occurs in the network device, and the operation is simple and easy to implement, thereby effectively solving the problem that the network is looped and the network is paralyzed. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a flowchart of a preferred embodiment of detecting a packet transmitting portion in an Ethernet port loopback detection method according to an embodiment of the present invention; FIG. 2 is a schematic diagram of an Ethernet port loopback detection method according to an embodiment of the present invention; A flowchart of a preferred embodiment of the packet receiving portion of the packet is detected. FIG. 3 is a block diagram showing a preferred embodiment of the Ethernet port loopback detecting device according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS In order to make the technical problems, technical solutions and beneficial effects of the present invention more clear and clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The method for detecting the loopback of the Ethernet port in the embodiment of the present invention is divided into two parts, one is a detecting message sending part, and the other is a detecting message receiving part. The following describes the embodiment of the present invention in detail with reference to specific embodiments. 1 is a flowchart of a preferred embodiment of detecting a packet sending part in an Ethernet port loopback detection method according to an embodiment of the present invention. As shown in FIG. 1, the embodiment specifically includes the following steps: Step S001: Setting a network device in advance Detects the protocol type of the packet and the VLAN mode. In the embodiment of the present invention, the VLAN mode of the detection packet is optional, that is, the detection packet may be a VLAN-free or a continuous VLAN or a discrete VLAN. mode. Step S002: The network device generates a detection packet according to the foregoing setting. In the embodiment of the present invention, the detection packet includes a field such as an Ethernet type, a source MAC address, a port number, and a keyword information. The source MAC address is a MAC address of the network device CPU, and the detection packet is a broadcast packet. Step S003: After the loopback detection function is enabled, the network device sends the detection packet from each port when the sending period comes. The sending period of the network device sending detection may be preset, and may be implemented by using a timer. For example, a timer with a timing of 2 seconds may be set as a period for the network device to send the detection packet. 2 is a flowchart of a preferred embodiment of detecting a packet receiving part in an Ethernet port loopback detection method according to an embodiment of the present invention. As shown in FIG. 2, the embodiment specifically includes the following steps: Step S101: The network device receives the detection. Message. Step S102: Determine whether the detection message is a locally sent detection message, and if yes, execute step S103; otherwise, execute step S107. In this step, the source MAC address field in the packet is detected to determine whether the detection packet is sent locally. In the step S103, the port number of the detection packet is parsed from the detection packet, the port link is closed, and a loopback alarm is generated and reported. The embodiment of the invention closes the port link by disabling the MAC address learning function of the port. Step S104: Enable the port link timer. The port link timer time can be preset, for example, it can be set to 30 seconds. Step S105: Determine whether the timer expires, if yes, execute step S106; otherwise, continue to perform this step. Step S106: The port link is enabled, and a loopback recovery alarm is generated and reported, and the process ends. In the embodiment of the present invention, the port link is enabled by enabling the MAC address learning function of the port. Step S107: Forwarding the detection packet to the next network device, and ending. In the embodiment of the present invention, the loopback alarm and the loopback recovery alarm include the network device number and the port number, so that after the alarm is reported, the user can know which port of the device has loopback. 3 is a schematic block diagram of a preferred embodiment of an Ethernet port loopback detection apparatus according to an embodiment of the present invention. As shown in FIG. 3, the Ethernet port loopback detection apparatus of the embodiment of the present invention includes: a setup module 01, a detection packet sending module. 02, the detection packet receiving module 03 and the port link timer 04; wherein, the setting module 01 is set to provide the user with the protocol type, the VLAN mode, the sending period, and the timing duration of the port link timer 04 for setting the detection packet. Interface and save user settings. The detection packet sending module 02 is configured to generate a detection packet according to the protocol type and the VLAN mode of the detection packet set in the setting module 01, and send the detection packet from each port of the network device when the sending period comes. . The detection packet receiving module 03 is configured to determine whether the detection packet received by the network device is a detection packet sent from the local device. When the detection packet is a local detection packet, the detection packet is parsed and sent from the detection packet. The port number of the packet is detected, the port link is closed, a loopback alarm is generated and reported, and the port link timer 04 is enabled. After the port link timer expires, the port link is enabled. The loopback recovery alarm is generated and reported. When the detection packet is not sent by the local device, the detection packet is forwarded to the next network device. Port link timer 04, set to the shutdown time of the timing port link. The above description shows and describes a preferred embodiment of the embodiments of the present invention, but as described above, it should be understood that the invention is not limited to the forms disclosed herein, and should not be construed as Various other combinations, modifications, and environments are possible and can be modified by the teachings of the above teachings or related art within the scope of the inventive concept described herein. All changes and modifications made by those skilled in the art are intended to be within the scope of the appended claims.

Claims

Claim

An Ethernet port loopback detection method, where the method includes the following steps:

The network device periodically sends detection packets from each port.

And determining whether the received detection packet is a locally sent detection packet, and if yes, parsing the port number of the detection packet from the detection packet, and closing the port link; otherwise, The detection message is forwarded to the next network device.

2. The method according to claim 1, wherein the method further comprises the following steps:

Set the protocol type of the detection packet for the network device in advance;

The network device generates a detection packet according to the setting.

The method according to claim 2, wherein after setting a protocol type for detecting a message, the method further performs the following steps:

Setting a virtual local area network VLAN mode for detecting the packet for the network device.

The method according to claim 1, wherein the detection message comprises an Ethernet type, a source medium access control MAC address, a port number, and a keyword information field.

The method of claim 4, wherein the network device generates a loopback alarm and reports the link link.

The method according to claim 1, wherein the network device performs the following steps simultaneously after the port link is closed:

Enable the port link timer.

If the port link timer expires, the port link is enabled and the loopback recovery alarm is generated and reported.

7. The method according to claim 1 or 6, wherein the method closes the port link by disabling the MAC address learning function of the port; and opening the port link by enabling the MAC address learning function of the port.

The method according to claim 5 or 6, wherein the loopback alarm and the loopback recovery alarm include a network device number and a port number.

9. The method according to claim 1, wherein the detection message is a broadcast packet.

The method according to claim 4, wherein the network device determines, according to the source MAC address field in the received detection packet, whether the detection packet is a locally sent detection packet.

An Ethernet port loopback detection device, where the device includes a detection packet sending module and a detection packet receiving module;

The detecting message sending module is configured to periodically generate a detecting message and send it out from each port of the network device;

The detection packet receiving module is configured to determine whether the network device receives the detection packet as a local detection packet, and when the detection packet is a local detection packet, the detection packet is sent from the detection packet. The port number of the detection packet is sent out, and the port link is closed. When the detection packet is not a local detection packet, the detection packet is forwarded to the next network device.

12. The apparatus of claim 11, wherein the apparatus further comprises a port link timer and a setting module,

The port link timer is set to a timeout period of the timing port link;

The setting module is configured to provide an interface for setting a protocol type of the detection packet, a virtual local area network VLAN mode, a sending period, and a timing duration of the port link timer, and saving the user setting.

The device according to claim 12, wherein the detection message receiving module is configured to generate a loopback alarm and report the same; and after the port link is closed, the port link timer is turned on, and After the port link timer expires, the port link is enabled and a loopback recovery alarm is generated and reported.