KR101144165B1 - System for measuring performance of network equipment based on ethernet - Google Patents

Abstract

PURPOSE: A system for measuring performance of an Ethernet-based network device is provided to measure network performance and BER performance of a WAN(Wide Area Network) section by processing data according to a performance evaluation index. CONSTITUTION: A reception switching device(130) receives a data packet which is transferred to a WAN section. The reception switching device processes the received data packet to the performance evaluation index. The reception switching device outputs the processed data packet to a second Ethernet port. A counting device(110) measures network performance or BER(Bit Error Rate) performance based on the data packet.

Description

System for measuring performance of Ethernet-based network equipment {SYSTEM FOR MEASURING PERFORMANCE OF NETWORK EQUIPMENT BASED ON ETHERNET}

The present invention relates to a method for measuring performance of a network device, and in particular, receives data using one external port provided in a network device, and processes data in different paths according to performance evaluation indicators within the device. The present invention relates to a system for measuring both network equipment performance, that is, network performance and BER performance in a WAN section.

In general, performance evaluation of Ethernet-based network devices is based on RFC2544, the performance criteria for network interconnect devices. The performance evaluation method based on RFC2544 is to evaluate the performance of two layers of the Open Systems Interconnection (OSI) layer, that is, the data link layer or higher protocol implementation / write state, and a bit error on the first layer, that is, the physical layer protocol. Rate) Performance evaluation function is not provided separately.

1 is an exemplary view for explaining a principle of measuring performance of Ethernet-based network equipment according to the prior art.

As shown in FIG. 1, the conventional Ethernet-based network device performs a CRC check of a received packet in an L3 switch and discards the entire packet when an error occurs, thereby making it impossible to measure BER in Layer 1.

The performance of the network equipment can be confirmed through RFC2544-based tests, but when it is necessary to check the performance of the WAN section link, it is necessary to measure the BER for the WAN section.

In the development / testing process of the Ethernet-based network device, a separate inspection interface was additionally manufactured outside the equipment to measure the BER performance of the WAN (Wide Area Network) section 1 layer link.

However, the prior art of additionally manufacturing the inspection interface outside the equipment has a great difficulty in development due to the requirements for the aircraft mounting apparatus, which has high constraints such as the size, weight, and production cost of the network device. In addition, unnecessary costs and time were spent identifying / resolving design or manufacturing errors in the inspection interface.

Therefore, to solve the problems of the prior art, an object of the present invention is to receive data using one external port provided in the network equipment, by processing the data in different paths according to the performance evaluation indicators in the equipment It is to provide a system for measuring the performance of the Ethernet-based network equipment, that is, network performance and BER performance of the WAN section.

However, the objects of the present invention are not limited to those mentioned above, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above objects, the system for measuring the performance of the Ethernet-based network equipment according to an aspect of the present invention is different from the data packet received through the first Ethernet port according to the performance evaluation index A transmission switching device which processes the path and then transfers it to the WAN section; A reception switching device configured to receive the data packet transferred to the WAN section, process the received data packet through different paths according to the performance evaluation indicators, and output the same to a second Ethernet port; And a meter for measuring network performance or bit error rate (BER) performance based on the data packet input to the first Ethernet port and the data packet output to the second Ethernet port.

If necessary, the performance indicator may be one of the network performance for two or more layers in the Open Systems Interconnection (OSI) layer 7 and the BER performance for one layer.

Preferably, the transmission switching device comprises: a first switch for switching data packets received through the first Ethernet port in different paths according to the performance evaluation indicators; An L3 switch configured to receive a data packet from the first switch and perform a CRC check of the received data packet when the performance evaluation index is network performance; A second switch transferring the data packet received from the L3 switch or the first switch; An Ethernet mapper that encapsulates the received data packet into a frame of a WAN section; And a modem transmitting the encapsulated data packet over a WAN section.

Preferably, the L3 switch may discard the data packet if there is an error in the data packet as a result of the CRC check.

Preferably, when the performance indicator is network performance, the Ethernet mapper performs a CRC check of the received data packet, and discards the entire data packet if there is an error in the data packet as a result of the CRC check. If there is no error in the packet, the data packet may be encapsulated in a frame of a WAN section.

Preferably, the receiving switching device includes a modem for receiving a data packet transmitted in the WAN interval; An Ethernet mapper which decapsulates and receives the received data packet; A first switch for switching the received data packet to different paths according to the performance evaluation indicators; An L3 switch configured to receive a data packet from the first switch and perform a CRC check of the received data packet when the performance evaluation index is network performance; And a first switch receiving the data packet from the first switch or the L3 switch and outputting the data packet to the second Ethernet port.

Preferably, when the performance indicator is network performance, the Ethernet mapper performs a CRC check of the data packet received from the L3 switch or the second switch, and if the data packet has an error as a result of the CRC check, the data. If the entire packet is discarded and there is no error in the data packet, the data packet may be encapsulated in a frame of a WAN section.

Preferably, the L3 switch may discard the data packet if there is an error in the data packet as a result of checking the CRC.

According to another aspect of the present invention, a system for measuring the performance of Ethernet-based network equipment includes a first switch for switching data packets received through an Ethernet port to different paths according to performance evaluation indicators; An L3 switch configured to receive a data packet from the first switch and perform a CRC check of the received data packet when the performance evaluation index is network performance; A second switch receiving a data packet from the first switch when the performance indicator is BER performance; An Ethernet mapper that encapsulates the data packet received from the L3 switch or the second switch into a frame of a WAN section; And a modem transmitting the data packet encapsulated in the Ethernet mapper over a WAN section.

Preferably, when the performance indicator is BER performance, the first switch may be connected to the second switch to switch the data packet to a path bypassing the L3 switch.

According to another aspect of the present invention, a system for measuring the performance of Ethernet-based network equipment includes a modem for receiving a data packet transmitted over a WAN section; An Ethernet mapper which decapsulates and receives the received data packet; A first switch for switching the received data packet to different paths according to the performance evaluation indicators; An L3 switch configured to receive a data packet from the first switch and perform a CRC check of the received data packet when the performance evaluation index is network performance; And a first switch receiving the data packet from the first switch or the L3 switch and outputting the data packet to the Ethernet port.

Preferably, when the performance indicator is BER performance, the first switch may be connected to the second switch to switch the data packet to a path bypassing the L3 switch.

Through this, the present invention receives data using one external port provided in the network equipment, but by processing the data in different paths in accordance with the performance evaluation indicators in the equipment, it is necessary to additionally produce a separate inspection interface There is no effect.

In addition, the present invention does not need to manufacture a separate inspection interface, there is an effect that can minimize the influence from various constraints such as size, weight, manufacturing cost when developing the device.

In addition, the present invention uses one external port provided in the network equipment, but by processing the data in different paths according to the performance evaluation indicators in the equipment, both the network performance and BER performance of the WAN section to one external port There is a measurable effect.

1 is an exemplary view for explaining a principle of measuring performance of Ethernet-based network equipment according to the prior art.
2 is an exemplary diagram illustrating a system for measuring the performance of network equipment according to an embodiment of the present invention.
3 is an exemplary view showing a detailed configuration of the transmission switching device 120 shown in FIG.
4 is a diagram illustrating a detailed configuration of the reception switching device 130 shown in FIG. 2.

Hereinafter, with reference to Figures 2 to 4 attached to the system for measuring the performance of the Ethernet-based network equipment according to an embodiment of the present invention. It will be described in detail focusing on the parts necessary to understand the operation and action according to the present invention. Like reference numerals in the drawings denote like elements throughout the specification.

In the present invention, the data is received using one external port provided in the network equipment, but by processing the data in different paths according to the performance evaluation index in the equipment, the performance of the network equipment of the WAN section to one external port, that is, We propose a system that can measure network performance and BER performance.

In this case, the performance indicators of network equipment include network performance of two or more layers in the OSI (Open Systems Interconnection) 7 layer, for example, throughput, latency, frame loss rate, and back-to-back frame ( back-to-back frames) and bit error rate (BER) performance for one layer.

2 is an exemplary diagram illustrating a system for measuring the performance of network equipment according to an embodiment of the present invention.

As shown in FIG. 2, the system for measuring the performance of the network equipment according to the present invention may include a meter 110, a transmission switching device 120, a reception switching device 130, and the like.

The meter 110 may transmit a predetermined data packet to the transmission switching device 120 in the form of a frame in a LAN section, and receive the data packet through the reception switching device 130. The meter 110 may measure network performance or BER performance based on the transmitted data packet and the received data packet.

Network performance includes throughput, latency, frame loss, back-to-back frame, etc. That is, 1) throughput may represent the maximum value of the frame rate that can be received without frame loss. 2) The delay time may indicate a transmission / reception time difference of a frame in a transmission / reception process. 3) The frame loss rate may indicate the number of frames lost during transmission and reception. 4) The back-to-back frame may represent the maximum number of frames received at the maximum line rate that can be processed without frame loss.

The meter 110 may not only be implemented as a single physically coupled equipment, but also may be implemented as two physically separated transmitting and receiving meters. That is, the transmission measuring instrument transmits a predetermined data packet to the transmission switching device 120, and the reception measuring instrument receives the data packet from the reception switching device 130 to measure network performance or BER performance.

At this time, the transmission switching device 120 receives the data packet from the measuring instrument 110 and processes the data using different paths or functions according to performance evaluation indexes, that is, network performance or BER performance. Will be explained.

3 is an exemplary view showing a detailed configuration of the transmission switching device 120 shown in FIG.

As shown in FIG. 3, the transmission switching device 120 according to the present invention includes an external port 121, a first switch 122, an L3 switch 123, a second switch 124, an FPGA 125, Ethernet mapper 126, modem 127, and the like. That is, according to the present invention, a path for transmitting a data packet to measure BER performance without additionally manufacturing a separate inspection interface for measuring BER performance of a wide area network (WAN) section 1 link outside the equipment is mutually different. The switch that can be switched differently, that is, the first switch 122 and the second switch 123 is to be provided and used. This is because the cyclic redundancy check (CRC) check function of the L3 switch 123 is not applied to the case of measuring the BER performance.

As for this reason, the present invention intends to perform the function of the Ethernet mapper 126, that is, the cyclic redundancy check (CRC) check function only when measuring network performance.

1) When receiving a control signal for measuring network performance for two or more layers from the instrument, the external port 120 may receive a data packet from the instrument through an Ethernet port, which is an interface of a LAN section.

The first switch 122 may transfer the received data packet to the L3 switch 123, and the L3 switch 123 may perform a CRC check of the input data packet. If there is an error in the data packet as a result of the check, the L3 switch 123 may discard the entire data packet.

On the other hand, if there is no error in the data packet as a result of the CRC check, the L3 switch 123 may check whether the destination MAC address of the data packet is the same as the MAC address of the corresponding port of the L3 switch. If the L3 switch 123 is the same as the result of the checking, the second switch 124 and the FPGA 125 are checked after switching to a port destined for the corresponding network by checking a destination address in the IP (Internet Protocol) data inside the data packet. To the Ethernet mapper 126.

The Ethernet mapper 126 may perform a CRC check of the data packet and discard the entire data packet if there is an error in the data packet as a result of the CRC check.

On the other hand, if there is no error in the data packet as a result of the CRC check, the Ethernet mapper 126 may be encapsulated in a frame form of the WAN section and then transmitted to the WAN section through the modem 127.

2) When receiving a control signal for measuring BER performance for one layer from the instrument, the external port 120 may receive a data packet from the instrument.

The first switch 122 is connected to the second switch 123 to switch to the bypass path so that the input data packet is not transmitted to the L3 switch 123, the second switch 123 is a data packet transmitted to the bypass path May be passed to the FPGA 125.

The FPGA 125 may transfer the received data packet to the Ethernet mapper 126 as it is.

The Ethernet mapper 126 may encapsulate the data packet in the form of a frame of the WAN section without performing a CRC check of the data packet and then transmit the data packet to the WAN section through the modem 127.

The reception switching device 130 receives the data packet from the transmission switching device 120 and processes the data using different paths or functions according to the performance evaluation index, that is, the network performance or the BER performance. Will be explained.

4 is a diagram illustrating a detailed configuration of the reception switching device 130 shown in FIG. 2.

As shown in FIG. 4, the reception switching device 130 according to the present invention includes an external port 131, a first switch 132, an L3 switch 133, a second switch 134, an FPGA 135, Ethernet mapper 136, modem 137, and the like.

1) When receiving a control signal for measuring network performance for two or more layers from the instrument, the modem 137 may receive a data packet through a WAN section.

The modem 137 may receive the data packet encapsulated in the frame of the WAN section and deliver the data packet to the Ethernet mapper 136.

After decapsulating the received data packet, the Ethernet mapper 126 performs a CRC check of the data packet and discards the entire data packet if there is an error in the data packet.

On the other hand, the Ethernet mapper 126 may forward the data packet to the FPGA 135 if there is no error in the data packet as a result of the CRC check.

The second switch 134 may transfer the data packet received from the FPGA 135 to the L3 switch 133, and the L3 switch 133 may perform a CRC check of the input data packet. If the L3 switch 133 determines that the data packet has an error as a result of the CRC check, the L3 switch 133 may discard the entire data packet.

On the other hand, if the L3 switch 123 determines that there is no error in the data packet as a result of the CRC check, the L3 switch 123 may transfer the data packet to the measuring instrument via the first switch 132 and the external port 131.

2) When receiving a control signal for measuring the BER performance for the first layer from the instrument, the modem 137 may receive a data packet over a WAN interval.

The modem 137 may receive a data packet encapsulated in a frame of a WAN section, decapsulate the received data packet, and deliver the received data packet to the Ethernet mapper 136.

The Ethernet mapper 136 may decapsulate the received data packet and then deliver the data packet to the FPGA 135 without performing CRC check of the data packet.

The second switch 134 is connected to the first switch 133 and switches to the bypass path so that data packets received from the FPGA 135 are not transferred to the L3 switch 123, and the first switch 133 is the bypass path. The data packet transmitted to the terminal may be transmitted to the measuring instrument through the external port 130 as it is.

Those skilled in the art to which the system for measuring the performance of the Ethernet-based network equipment according to the present invention will be capable of various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

110: Instrument
120: transmission switching device
130: receiving switching device
121, 131: external port
122, 132: first switch
123, 133: L3 switch
124, 134: second switch
125, 135: FPGA
126, 136: Ethernet Mapper
127, 137: modem

Claims (12)

A transmission switching device configured to receive a data packet through a first Ethernet port and process the received data packet in a different path according to a performance evaluation index and then transfer the data packet to a WAN section;
A reception switching device configured to receive the data packet transferred to the WAN section, process the received data packet through different paths according to the performance evaluation indicators, and output the same to a second Ethernet port; And
A meter for measuring network performance or bit error rate (BER) performance based on the data packet input to the first Ethernet port and the data packet output to the second Ethernet port;
System for measuring the performance of Ethernet-based network equipment comprising a. The method according to claim 1,
The performance evaluation index is a system for measuring the performance of the Ethernet-based network equipment, characterized in that any one of the network performance for more than two layers in the OSI (Open Systems Interconnection) layer 7, and the BER performance for the first layer. . The method according to claim 1,
The transmission switching device,
A first switch for switching data packets received through the first Ethernet port to different paths according to the performance evaluation indicators;
An L3 switch configured to receive a data packet from the first switch and perform a CRC check of the received data packet when the performance evaluation index is network performance;
A second switch transferring the data packet received from the L3 switch or the first switch;
An Ethernet mapper that encapsulates the received data packet into a frame of a WAN section; And
A modem for transmitting the encapsulated data packet over a WAN section;
System for measuring the performance of the Ethernet-based network equipment comprising a. The method of claim 3,
The L3 switch,
And discarding the data packet if there is an error in the data packet as a result of the CRC check. The method of claim 3,
The Ethernet mapper is,
If the performance indicator is network performance, perform a CRC check of the received data packet, and if there is an error in the data packet as a result of the CRC check, discard the entire data packet,
If there is no error in the data packet, the system for measuring the performance of the Ethernet-based network equipment, characterized in that to encapsulate the data packet in the form of a frame of the WAN interval. The method according to claim 1,
The reception switching device,
A modem for receiving a data packet transmitted in the WAN section;
An Ethernet mapper which decapsulates and receives the received data packet;
A first switch for switching the received data packet to different paths according to the performance evaluation indicators;
An L3 switch configured to receive a data packet from the first switch and perform a CRC check of the received data packet when the performance evaluation index is network performance; And
A second switch receiving the data packet from the first switch or the L3 switch and outputting the data packet to the second Ethernet port;
System for measuring the performance of the Ethernet-based network equipment comprising a. The method of claim 6,
The Ethernet mapper is,
If the performance indicator is network performance, after decapsulating the received data packet, CRC check of the data packet is performed, and if there is an error in the data packet as a result of the CRC check, the entire data packet is discarded.
And if there is no error in the data packet, forwarding the data packet to the first switch. The method of claim 6,
The L3 switch,
And discarding the data packet if there is an error in the data packet as a result of the CRC check. A first switch for switching data packets received through the Ethernet port to different paths according to the performance evaluation indicators;
An L3 switch configured to receive a data packet from the first switch and perform a CRC check of the received data packet when the performance evaluation index is network performance;
A second switch receiving a data packet from the first switch when the performance indicator is BER performance;
An Ethernet mapper that encapsulates the data packet received from the L3 switch or the second switch into a frame of a WAN section; And
A modem for transmitting the data packet encapsulated in the Ethernet mapper over a WAN section;
System for measuring the performance of the Ethernet-based network equipment comprising a. 10. The method of claim 9,
Wherein the first switch, when the performance indicator is BER performance, measuring the performance of the Ethernet-based network equipment, characterized in that connected to the second switch to switch the data packet to the path bypassing the L3 switch System. A modem for receiving a data packet transmitted over a WAN section;
An Ethernet mapper which decapsulates and receives the received data packet;
A first switch for switching the received data packet to different paths according to performance evaluation indicators;
An L3 switch configured to receive a data packet from the first switch and perform a CRC check of the received data packet when the performance evaluation index is network performance; And
A second switch receiving the data packet from the first switch or the L3 switch and outputting the data packet to an Ethernet port;
System for measuring the performance of the Ethernet-based network equipment comprising a. The method of claim 11, wherein
When the performance indicator is the BER performance, the first switch is connected to the second switch to switch the data packet to the path bypassing the L3 switch, characterized in that for measuring the performance of Ethernet-based network equipment system.

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