KR101396779B1 - Method of isolation and release the isolation of loop port of network node detected data looping status - Google Patents

Abstract

A method for automatically isolating and quarantining a loop port of a network node where a data looping phenomenon is detected is disclosed. A method of automatically isolating and isolating a loop port of a network node in which a data looping phenomenon is detected according to an embodiment of the present invention includes detecting a data looping phenomenon in a network and isolating a loop port of a network node in which a data looping phenomenon occurs, It is possible to monitor whether the looping phenomenon is continued to automatically restore the isolated port when the data looping phenomenon is released, thereby restoring the loop port even when the data looping phenomenon is not canceled, And the loop port is continuously isolated even after the data looping phenomenon is released, so that it is possible to solve the inconvenience that the network manager must manually restore the loop port to its original state.

Description

METHOD OF ISOLATION AND RELEASE OF LOOP PORT OF NETWORK NODE DETECTED DATA LOOPING STATUS BACKGROUND OF THE INVENTION 1. Field of the Invention [

The present invention relates to a method of automatically isolating and releasing a loop port of a network node in which data looping phenomenon is detected, more particularly, to a method of detecting data looping phenomenon in a network and isolating a loop port of a network node And monitors whether the data looping phenomenon is continued to automatically restore the isolated port when the data looping phenomenon is canceled.

In the Ethernet network, if the cable connection between the Ethernet network nodes is wrong, data looping can occur, which can have a serious effect, such as paralyzing the Ethernet network. The types of data looping phenomenon that may occur in such an Ethernet network will be briefly described with reference to FIG.

Referring to FIG. 1, a loop (loop 1) occurring between two Ethernet network nodes, a cable loop occurring in one Ethernet network node (loop 2 ), A network loop (loop 3) that occurs via three or more Ethernet network nodes, and so on.

That is, for example, the loop 1 is configured such that a packet transmitted from the Ethernet switch 1 to the Ethernet network through its own port B is transmitted to the port A of the Ethernet switch 1 via the port B of the Ethernet switch 2 and the port A, . ≪ / RTI >

Loop 2 is the case when the packet that the Ethernet switch 3 transmitted to the Ethernet network through its own port C is returned to its own port B again.

In the loop 3, for example, when a packet transmitted from the Ethernet switch 1 to the Ethernet network through its own port E is transmitted to the port B and the port A of the Ethernet switch 5, the port B and the port A of the Ethernet switch 4 And returns to the port D of the Ethernet switch 1 again.

A method of detecting such a loop includes a method in which an Ethernet network node periodically transmits a packet for loop detection to the Ethernet network to confirm whether the packet is returned to the Ethernet network, There is a method of confirming whether or not it moves more than a threshold value per hour.

When a loop is detected through such a detection method, the Ethernet network manager blocks transmission and reception of packets through the loop port or shut down the loop port for isolation from the Ethernet network for a predetermined time, When the specified time elapses, the loop port is restored to its original state. In the conventional detection method, the loop port is isolated during the time specified by the Ethernet network administrator in the loop detection. Therefore, even if the loop port is not released, the loop port is restored and the Ethernet network is again adversely affected. So that the network manager has to manually restore the loop port to its original state.

Prior art relating to the present invention is Korean Patent Laid-Open No. 10-2012-0028053 (published on February 22, 2012).

Detects the data looping phenomenon in the network, isolates the loop port of the network node where the data looping phenomenon occurs, monitors whether the data looping phenomenon is continued, and restores the isolated port when the data looping phenomenon is released A method of automatically isolating and isolating a loop port of a network node in which a data looping phenomenon is detected is proposed.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems that are not mentioned can be clearly understood by those skilled in the art from the following description.

A method for a network node connected to a network and having a plurality of ports according to an aspect of the present invention automatically isolates and isolates a loop port in which data looping phenomenon is detected among the plurality of ports, Isolating the loop port from the network by blocking all packets received at the loop port; Monitoring whether the isolation state of the loop port corresponds to the isolation release state; And releasing the isolation of the loop port by releasing the reception blocking state of the packets through the loop port when the isolation state of the loop port corresponds to the isolation release state.

The network node transmits a loop detection packet to the network and then increases the receiving counter of the loop detection packet to the loop port or moves the port MAC address to which the MAC of the loop port in which the loop detection packet is detected is changed, It can be determined that the data looping phenomenon has occurred.

Wherein the isolation release state is a state in which the reception count of the loop detection packet in the loop port is not increased, the total packet count received in the loop port per unit time is less than a specified value, and the port MAC address movement has not occurred The loop release timer value may reach the loop release condition value.

The destination MAC address of the loop detection packet may be a broadcast MAC address, and the source MAC address of the loop detection packet may be a MAC address of the network node.

According to the method of automatically isolating and releasing the loop port of a network node in which data looping phenomenon is detected according to an embodiment of the present invention, it is possible to detect a data looping phenomenon in a network and isolate a loop port of a network node, And monitors whether the data looping phenomenon is continued to automatically restore the isolated port when the data looping phenomenon is canceled. Thus, the loop port is restored even though the data looping phenomenon is not released, It is possible to solve the inconvenience that the loop port is continuously isolated even after the data looping phenomenon is released and the network manager must manually restore the loop port to its original state.

1 is a diagram illustrating an Ethernet network to which an embodiment of the present invention is applied.
2 is a flowchart of a method of automatically isolating and quarantining a loop port of a network node in which data looping phenomenon is detected according to the first embodiment of the present invention.
3 is a flowchart of a method of automatically isolating and releasing a loop port of a network node in which a data looping phenomenon is detected according to a second embodiment of the present invention.
4 is a flowchart of a method of automatically isolating and releasing a loop port of a network node in which data looping phenomenon is detected according to the third embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

A method for automatically isolating and releasing a loop port of a network node in which a data looping phenomenon is detected according to an embodiment of the present invention will now be described in detail with reference to FIGs. 1, 2, 3, 4, and 5, respectively. In FIG. 1, an Ethernet network is illustrated as an Ethernet switch. However, the Ethernet network may be configured not only as an Ethernet switch but also as Ethernet network nodes such as a router and a repeater. Therefore, if the Ethernet network node has a plurality of ports and is capable of transmitting packets to the Ethernet network through the plurality of ports or receiving packets from the Ethernet network, the loop port of the detected network node may be automatically isolated and / A method of releasing isolation may be applied.

A method for automatically isolating and quarantining a loop port of a network node that detects a data looping phenomenon according to the present invention includes isolating the loop port from the network by blocking all packets received at the loop port, Monitors whether the isolation state of the loop port corresponds to the isolation release state and releases the reception blocking state of the packets through the loop port when the isolation state of the loop port corresponds to the isolation release state, And releasing the isolation.

At this time, the network node transmits a loop detection packet to the network, and then increases the reception counter of the loop detection packet to the loop port or moves the port MAC address to change the MAC of the loop port in which the loop detection packet is detected it is determined that the data looping phenomenon has occurred.

If the total packet count received in the loop port per unit time is less than a specified value and the port MAC address movement does not occur in the loop port, And the loop release timer value reaches the loop release condition value in at least one state.

The destination MAC address of the loop detection packet may be a broadcast MAC address, and the source MAC address of the loop detection packet may be a MAC address of the network node.

Hereinafter, embodiments of a method for isolating and isolating a loop port in which a data looping phenomenon is detected according to the present invention will be described with reference to FIG. 2 to FIG. In other words, we will discuss how to automatically isolate and quarantine the loop port where the data looping phenomenon is detected in the state where the data looping phenomenon occurs in the network node.

2 is a flowchart illustrating a method of isolating and isolating a loop port in which data looping phenomenon is detected according to the first embodiment of the present invention.

Referring to FIG. 2, the network node blocks all packets received from the loop port detected as a data looping phenomenon from the network, thereby isolating the loop port from the network (S1). Thereafter, the network node initializes a loop release timer for determining whether the data looping phenomenon detected in the loop port is released (S2). At this time, the set value has a value larger than "0" and can be set by the network administrator.

Thereafter, the network node checks whether the reception count of the loop detection packet is increased at the loop port (S3). The reception count of the loop detection packet may be increased each time a loop detection packet is received by the loop detection packet reception counter activated by the network node when data looping phenomenon is detected in the loop port.

If the reception count of the loop detection packet has not increased, the network node decreases the loop release timer value by a predetermined value (S4). At this time, the predetermined value may be, for example, "1", but is not limited thereto.

The network node decrements the loop release timer value and then checks whether the loop release timer value is a loop release condition value (S5). At this time, the value of the loop release condition may be "0" and may be set by the network administrator. The network manager may use a different value depending on the situation.

If the loop release timer value is equal to the loop release condition value, the network node determines that the data looping phenomenon has disappeared in the loop port and releases the isolation of the loop port (S6).

As described above, a method of automatically isolating and isolating a loop port in which a data looping phenomenon is detected according to the present invention monitors whether the isolation state of the loop port corresponds to the isolation release state, S2 to S5 and releasing the isolation state of the loop port by releasing the reception blocking state of packets through the loop port when the isolation state of the loop port corresponds to the isolation release state, May be implemented through step S6.

FIG. 3 is a flowchart illustrating a method of isolating and isolating a loop port in which data looping phenomenon is detected according to a second embodiment of the present invention.

Referring to FIG. 3, the network node blocks all packets received from the loop port detected as a data looping phenomenon from the network, thereby isolating the loop port from the network (S11). Thereafter, the network node initializes a loop release timer for determining whether the data looping phenomenon detected in the loop port is released (S12). At this time, the set value has a value larger than "0" and can be set by the network administrator.

Then, the network node checks whether the total packet count received in the loop port per unit time in the loop port has increased by more than a specified value (S13). At this time, the total packet count (count) received at the loop port may be increased each time a broadcast packet, a multicast packet, or a unicast packet is received at the loop port. The reason why the step S13 is performed is that the loop detection packet may not be received at all in the loop port even though the data looping phenomenon occurs due to the characteristic of the network line having a limited bandwidth.

If the total packet count received in the loop port per unit time is not equal to or greater than the specified value, the network node decreases the loop release timer value by a predetermined value (S14). At this time, the predetermined value may be, for example, "1", but is not limited thereto.

After decrementing the loop release timer value, the network node checks whether the loop release timer value is a loop release condition value (S15). At this time, the value of the loop release condition may be "0" and may be set by the network administrator. The network manager may use a different value depending on the situation.

If the loop release timer value is equal to the loop release condition value, the network node determines that the data looping phenomenon has disappeared in the loop port and releases the isolation of the loop port (S16).

As described above, a method of automatically isolating and isolating a loop port that detects a data looping phenomenon according to the present invention monitors whether the isolation state of the loop port corresponds to the isolation release state, S12 to S15. In the case where the isolation state of the loop port corresponds to the isolation release state, releasing the reception blocking state of the packets through the loop port and releasing the isolation of the loop port is performed as shown in FIG. 3 May be implemented through step S16.

4 is a flowchart illustrating a method of isolating and releasing a loop port in which data looping phenomenon is detected according to a third embodiment of the present invention.

Referring to FIG. 4, in step S21, the network node blocks all packets received from the loop port where the data looping phenomenon is detected from the network to isolate the loop port from the network. Thereafter, the network node initializes a loop release timer for determining whether the data looping phenomenon detected in the loop port is released (S22). At this time, the set value has a value larger than "0" and can be set by the network administrator.

Thereafter, the network node checks whether the port MAC address has been moved (S23). At this time, the port MAC address is moved, for example, when the source MAC address of the packet received at the first port of the network node is registered in the first port through the learning process, A MAC address of a packet registered in the second port and then registered in the second port is registered in the first port and then registered in the first port The MAC address of the packet is registered again in the second port.

If the port MAC address has not been moved, the network node decreases the loop release timer value by a predetermined value (S24). At this time, the predetermined value may be, for example, "1", but is not limited thereto.

After decrementing the loop release timer value, the network node checks whether the loop release timer value is a loop release condition value (S25). At this time, the value of the loop release condition may be "0" and may be set by the network administrator. The network manager may use a different value depending on the situation.

If the loop release timer value is equal to the loop release condition value, the network node determines that the data looping phenomenon has disappeared in the loop port and releases the isolation of the loop port (S26).

As described above, a method of automatically isolating and isolating a loop port in which a data looping phenomenon is detected according to the present invention monitors whether the isolation state of the loop port corresponds to the isolation release state, S22 to S25. In a case where the isolation state of the loop port corresponds to the isolation release state, the isolation state of the loop port is released by releasing the reception blocking state of the packets through the loop port, May be implemented through step S26.

Embodiments of a method for automatically isolating and releasing a loop port in which a data looping phenomenon has been detected according to the present invention have been described with reference to FIGS. 2 to 4. FIG.

In the above embodiments, it is determined whether an increase in the reception count of the loop detection packet occurs in the case of FIG. 2. In the case of FIG. 3, it is determined whether or not the total packet count received in the loop port per unit time is equal to or less than a specified value. It is determined that the port loopback phenomenon has disappeared in the loop port if the loop release timer value is the loop release condition value, Isolation was released.

However, the present invention is not limited to this, and when the increase of the reception count of the loop detection packet does not occur, when the total packet count received at the loop port per unit time is less than a specified value, It is determined that the data looping phenomenon has disappeared in the loop port if the loop release timer value is a loop release condition value and the isolation of the loop port is released. Therefore, unlike FIGS. 2 to 4, it is determined whether or not the data looping phenomenon is solved by combining two or more judgments as to whether or not the data looping phenomenon described in FIGS. 2 to 4 is solved. Which is more accurate than in each case.

The present invention has been described above with reference to the embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. Therefore, the scope of the present invention is not limited to the above-described embodiments, but should be construed to include various embodiments within the scope of the claims and equivalents thereof.

Claims (4)

A method for automatically isolating and quarantining a loop port of a network node connected to a network and having a plurality of ports, wherein a data looping phenomenon is detected among the plurality of ports,
Isolating the loop port from the network by blocking all packets received at the loop port;
Monitoring whether the isolation state of the loop port corresponds to the isolation release state; And
And releasing the isolation of the loop port by releasing the reception blocking state of the packets through the loop port when the isolation state of the loop port corresponds to the isolation release state,
The network node transmits a loop detection packet to the network and then increases the receiving counter of the loop detection packet to the loop port or moves the port MAC address to which the MAC of the loop port in which the loop detection packet is detected is changed, It is determined that the data looping phenomenon has occurred,
Wherein the isolation release state is a state in which the reception count of the loop detection packet in the loop port is not increased, the total packet count received in the loop port per unit time is less than a specified value, and the port MAC address movement has not occurred When the loop release timer value reaches the loop release condition value.
delete delete The method according to claim 1,
Wherein the destination MAC address of the loop detection packet is a broadcast MAC address, and the source MAC address of the loop detection packet is a MAC address of the network node.

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