KR20020047754A - Method for determining broadcast port - Google Patents

Abstract

PURPOSE: A method for determining broadcast port is provided to solve the inconvenience denoting the division of a representative trunking port and a general trunking port, so that it is easy to set the function of the trunking port. CONSTITUTION: Switch systems(10,20) sets broadcasting filtering to the every trunking ports such as five trunking ports(P10)(P11)(P12)(P13)(P14)(P15) for setting the representative trunking port of the switching system(10) in the state that the power is turning on. Thereafter, the link of the trunking ports(P10)(P11)(P12)(P13)(P14)(P15) between the systems(10,20) is discriminated whether the link is in an active state meaning a normal connection state. Thereafter, the existence of a broadcast packet is checked among the packets of trunking ports(P10)(P11)(P12)(P13)(P14)(P15) repeatedly twice. The trunking port having the broadcast packet is determined by the representative packet.

Description

Method for determining broadcast port

The present invention relates to a method for determining a broadcast port, and more particularly, to solve the problem of specifying a distinction between a representative trunking port and a general trunking port between switch systems, while determining a broadcast port to prevent communication failure through the trunking port. It is about a method.

In general, a trunk in a telephone system refers to a large-capacity telephone channel installed between two telephone exchange systems, and has a wide bandwidth to simultaneously process voice and data signals. In general, a port includes one representative trunking port for a broadcast packet and a general trunking port for a unicast packet. Typical switch systems are connected as shown in FIG. 1 when there are five trunking ports. In FIG. 1, five trunking ports P10, P11, P12, P23, and P14 of the switch systems 10 and 20 correspond to one-to-one by the respective connection lines 30. And the terminals 40 and 50 are electrically connected to the switch systems 10 and 20.

In the case of a switch system connected in this way, conventionally, each CPU (not shown) of the switch systems 10 and 20 is connected to trunking among all ports, for example, five trunking ports. Trunking ports P10, P11, P12, P13, and P14 are designated.

In addition, the nature of each of the trunking ports P10, P11, P12, P13, and P14 is specified. That is, for each of the trunking ports P10, P11, P12, P13, and P14, a representative trunking port or a general trunking port is designated. In this case, the number of trunking ports participating in the trunking of the switch systems 10 and 20 should be the same, and the connection positions of the representative trunking ports of the switch systems 10 and 20 should be the same. For example, the trunking port P10 is designated as a representative trunking port, and the remaining trunking ports P11, P12, P13, and P14 are designated as general trunking ports.

After the function setting of the trunking ports is made, five trunking ports exist, and each of these switch systems operating at a speed of 100 Mbps has one trunking port operating at a speed of 1000 Mbps between the switch systems. Has the same effect.

On the other hand, if the packet input from the terminal 40 is to be delivered to the terminal 50, since the first packet input from the terminal 40 to the switch system 10 is input in the form of a broadcast packet, the first packet The packet is transmitted to the terminal 50 via the trunking port P10 of the switch system 10, which is a representative trunking port, and the trunking port P10 of the switch system 20. In addition, the terminal 50 transmits a broadcast response packet having its own medium access control (MAC) to the terminal 40 in a reverse order to the above.

After that, only packets in the form of unicast packets are used for communication. Before this step, in the switch system 10, a packet in the form of unicast packets participates in trunking, for example, a trunking port (P11). In the switch system 20, a packet having a unicast packet form is designated as a trunking port P12, for example, as a general trunking port for participating in trunking. Since the process of designating the general trunking port is less relevant to the gist of the present invention, a detailed description thereof will be omitted for convenience of description.

After the process of designating the general trunking port is completed, the packet having the form of a normal unicast packet passes through the trunking port P11 of the switch system 10 and the trunking port P11 of the switch system 20. 20, and is transmitted to the switch system 10 via the trunking port P12 of the switch system 20 and the trunking port P12 of the switch system 10. Of course, if there are additional terminals, it may be applied to the trunking port of the idle state (idle) that is not previously designated according to the concept of equal distribution, but the communication distribution may be applied, but for convenience, detailed description thereof will be omitted. Shall be.

However, in the conventional two switch systems, since the function setting is made for each trunking port, when the positions of the representative trunking ports in charge of the broadcast packet do not match when the port function is set, when the first operation is made. Since the broadcast packet is not processed normally, communication through the trunking port is virtually impossible. In order to prevent this problem, it is inconvenient to specify the distinction between the representative trunking port and other general trunking ports for the processing of the broadcast packet when the trunking function is set.

Accordingly, an object of the present invention is to provide a broadcast port determination method that facilitates the function setting of the trunking port while eliminating the inconvenience of specifying the distinction between the representative trunking port and the general trunking port.

Another object of the present invention is to provide a method for determining a broadcast port, which normally processes a broadcast packet to prevent communication failure through a trunking port at the first operation.

1 is a block diagram showing a connection between a general switch system to which the present invention is applied.

2 is a flowchart showing a broadcast port determining method according to the present invention;

The broadcast port determination method according to the present invention for achieving the above object is

Setting broadcast filtering of trunking ports belonging to trunking between switch systems;

Checking whether a link of the trunking ports is active;

If the link is actively checked, checking whether a broadcast packet exists among packets belonging to the trunking ports;

If it is checked that the broadcast packet exists, determining a trunking port in which the broadcast packet exists as a representative trunking port and releasing the broadcast filtering;

Checking whether a broadcast packet is received at the determined representative trunking port for a predetermined time; And

And if it is determined that the broadcast packet is not received at the representative trunking port, returning to determining whether the broadcast packet exists.

Advantageously, if it is determined that the broadcast packet does not exist, generating and transmitting a random broadcast packet at an arbitrary period to the trunking port of the first number of the trunking ports.

Preferably determining the representative trunking port is

If it is checked that the broadcast packet is present, checking whether the broadcast packet is received after any time; And

And determining as a representative trunking port a trunking port at which the broadcast packet count increases during the predetermined time.

Therefore, according to the present invention, even if the positions of the representative ports responsible for the broadcast packets of the two switch systems do not match, since the processing of the broadcast packet is normally processed at the first operation, communication failure through the trunking port is prevented.

Hereinafter, a method for determining a broadcast port according to the present invention will be described in detail with reference to the accompanying drawings. 2 is a flowchart illustrating a method for determining a broadcast port according to the present invention. For convenience of description, the description will be made with reference to FIG. 1.

Referring to FIG. 2, in step S1, first, all trunking ports belonging to trunking to set a representative trunking port of the switch system 10 in a state where the power of the switch systems 10 and 20 of FIG. 1 is turned on. For example, broadcast filtering is set for each of the five trunking ports P10, P11, P12, P13, and P14. Here, the Ethernet chip of the switch system 10 and 20 is limited to an Ethernet chip that supports broadcast filtering, and the premise that trunking ports of the switch system 10 and 20 must match in pairs. The condition must be met.

In the step S2, after the setting of the broadcast filtering is completed, the trunking ports P10, P11, P12, P13, and P14 between the switch systems 10 and 20 are completed. Checks whether the link is active, which means it is normally connected.

In step S3, after the link of the trunking ports is actively checked, a broadcast packet is included among packets belonging to each of the trunking ports P10, P11, P12, P13, and P14. The presence is checked repeatedly at, for example, two times at random time intervals. In more detail, if the broadcast packet is primarily present, it is checked whether a packet of the broadcast is received again even after a certain time from the existence of the broadcast packet. That is, it is checked whether the count of broadcast packets increases to the MIB count of the trunking port during this time.

At this time, if it is checked that the broadcast packet is present, in step S4, the trunking port in which the broadcast packet exists is determined as a representative trunking port, and the setting of the broadcast filtering is released, and the process returns to step S3. . That is, the trunking port, for example, the trunking port P10, in which the count of the broadcast packets increases, is determined as the representative trunking port, and the broadcast filtering function of the trunking port P10 is disabled and trunking is enabled. This case corresponds to a trunking case between a system that supports the above function and a system that does not.

On the other hand, if it is checked that the broadcast packet does not exist, in step S5, the trunking port having the fastest number among the trunking ports belonging to the trunking is arbitrarily determined as a representative trunking port, and the switch system 10 determines Cast packets are generated at random intervals, e.g., 1 packet / second, and sent to the switch system 20. The MIB count of the trunking port is then checked for 0.5 seconds. This case is an algorithm to be applied since both will not increase in the case of the first MIB count check between systems supporting the function, and solves the case where no broadcast packet exists on the network.

In step S6, after the trunking is enabled, it is checked whether a broadcast packet is received at the representative trunking port trunking port P10 for a predetermined time, for example, 30 to 60 seconds. At this time, if the broadcast packet is not received at the representative trunking port, in step S7, broadcast filtering of all trunking ports is set for setting the representative trunking port, and the process returns to step S3. In more detail, by checking the MIB count of all the trunking ports (P10), (P11), (P12), (P13), (P14) belonging to the trunking to check the reception of the broadcast packet, and If reception of a broadcast packet is detected at another trunking port, it is checked whether the reception of a broadcast packet is detected again at the other trunking port even after a certain time has elapsed. When the reception of the broadcast packet to the other trunking port is detected again, the broadcast filtering of the existing representative trunking port is enabled, the broadcast filtering function of the corresponding trunking port is disabled, and the trunking with the new representative trunking port is enabled. do.

On the other hand, the present invention is not limited to the contents described in the drawings and the upper description, it is obvious to those skilled in the art that various forms of modifications are possible without departing from the spirit of the invention. .

As described above, the method for determining a broadcast port according to the present invention sets broadcast filtering for each of the trunking ports to set a representative trunking port among trunking ports belonging to trunking between switch systems, and the trunking Check if the link of ports is active. At this time, if the link of the trunking port is active, it is checked whether a broadcast packet exists among packets belonging to each of the trunking ports, and if it is checked that the broadcast packet exists, the trunking port where the broadcast packet exists. Is determined as the representative trunking port, and the broadcast filtering is unset and the trunking is enabled. If it is determined that the broadcast packet does not exist, the trunking port having the fastest number among the trunking ports belonging to the trunking is arbitrarily determined as a representative trunking port, and random broadcast packets are generated, for example, by 1 packet / sec. Transmit to the switch system and continue to check the trunking MIB count for 0.5 seconds. After the broadcast filtering is released, it is checked whether a broadcast packet is received at the representative trunking port, for example, for 30 to 60 seconds or more. At this time, if the broadcast packet is not received through the representative trunking port, the broadcast filtering of all trunking ports is set to set the representative trunking port, and the process returns to the step of checking whether the broadcast packet exists.

Accordingly, the present invention can prevent the communication failure through the trunking port at the first operation because the processing of the broadcast packet is performed at the first operation even if the location of the representative port responsible for the broadcast packet between the switch systems does not match. have.

Claims (3)

Setting broadcast filtering of trunking ports belonging to trunking between switch systems; Checking whether a link of the trunking ports is active; If the link is actively checked, checking whether a broadcast packet exists among packets belonging to the trunking ports; If it is checked that the broadcast packet exists, determining a trunking port in which the broadcast packet exists as a representative trunking port and releasing the broadcast filtering; Checking whether a broadcast packet is received at the determined representative trunking port for a predetermined time; And And if it is determined that the broadcast packet is not received at the representative trunking port, returning to determining whether the broadcast packet is present. The method of claim 1, further comprising: generating and transmitting a random broadcast packet to a trunking port of the first number among the trunking ports at random intervals when the broadcast packet is detected as not present. How to determine broadcast ports. The method of claim 1, wherein the determining of the representative trunking port is If it is checked that the broadcast packet is present, checking whether the broadcast packet is received after any time; And And determining as a representative trunking port a trunking port for which a broadcast packet count increases during the predetermined time period.