KR100346207B1 - Apparatus and method for testing ethernet packet switching between mac and phy - Google Patents

Abstract

The present invention is to test the Ethernet packet switching between the MAC and the physical layer by using a virtually implemented physical layer, the process of reading the Ethernet file defining the Ethernet packet, and analyzing the information of the Ethernet packet source of the corresponding port Storing the packet in a packet; transmitting the Ethernet packet to a MAC through a corresponding port of a physical layer; storing the Ethernet packet received from the MAC in an expected packet through Ethernet switching; And checking the Ethernet switching by determining whether the information of the stored Ethernet packet and the information of the Ethernet packet stored in the expected anticipation packet coincide with each other.

Description

Device and method for testing Ethernet packet switching between MAC and physical layer {APPARATUS AND METHOD FOR TESTING ETHERNET PACKET SWITCHING BETWEEN MAC AND PHY}

The present invention relates to an Ethernet network, and in particular, a virtual physical layer device for transmitting / receiving an Ethernet packet to a medium access control (MAC) is implemented in a hardware description language (HDL). Test method and method for testing whether an Ethernet packet made in a virtual physical layer is transmitted to a MAC through a MII (Media Independent Interface) and whether the packet is normally switched in the Ethernet switching logic to be outputted correctly to the physical layer through the MAC. will be.

In general, since the Ethernet switching chip of the Ethernet network does not include a MAC, the operation of the chip was tested by modeling the MAC part as HDL.

FIG. 1 illustrates an Ethernet switching test apparatus modeling a MAC part in HDL for testing an Ethernet switching chip not integrated with the conventional MAC. The Ethernet file unit 100 and the Ethernet read file drive unit ETH_READ_FILE_DRV 102 ), The conventional test apparatus 101 including the Ethernet source envelope (ETH_SRC_FIFO) 104, the Ethernet MAC layer drive unit (ETH_QUAD_DRV) 108, the reception expected envelope unit (ETH_EXP_FIFO) 106, and the like, is illustrated in FIG. As can be seen, there was a problem that the MAC part should be implemented in a separate HDL.

As described above, the conventional Ethernet switching test apparatus implements the MAC part as a separate HDL.

Accordingly, an object of the present invention is to provide a test apparatus and method capable of testing an Ethernet switching chip in which a MAC is integrated while maintaining the structure of a conventional MAC TB for SECore 10 testing.

1 is a block diagram of a conventional Ethernet switching chip test apparatus,

2 is a block diagram of an Ethernet switching chip test apparatus according to an embodiment of the present invention;

3 is a process flow diagram for testing Ethernet packet switching between a MAC and a physical layer in accordance with an embodiment of the present invention.

The present invention for achieving the above object in the Ethernet packet switching between the MAC and the physical layer using the physical layer implemented virtually, the process of reading an Ethernet file defining the Ethernet packet, and the information of the Ethernet packet Analyzing and storing the packet in the source packet of the corresponding port, transmitting the Ethernet packet to the MAC through the corresponding port of the physical layer, and storing the Ethernet packet received from the MAC through the Ethernet switching in the expected packet. And checking the Ethernet switching by determining whether the information of the Ethernet packet stored in the source packet and the information of the Ethernet packet stored in the expected prediction packet match.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

FIG. 2 is a block diagram of an Ethernet switching chip test apparatus in which a MAC part in which a virtual physical layer device is implemented in a hardware description language (HDL) according to an embodiment of the present invention is integrated. Referring to FIG. 2, the test apparatus 202 includes an Ethernet file unit 200 for storing test files instead of Ethernet packet information, and a file for replacing Ethernet packet information with a physical layer test bench (TB). The Ethernet read file drive unit (ETH_READ_FILE_DRV) 204 to read and store the information of the packet from the Ethernet read file drive unit 204 for each port in place of the FIFO present in each port A source layer PHY_SRC_FIFO 206, a physical layer drive unit PHY_QUAD_DRV 210 for driving an Ethernet file input from the Ethernet read file drive unit 204 to respective ports of the physical layer, and respective ports The physical layer port drive unit (PHY_PORT_DRV) 216 and the physical layer drive unit 210 when packet transmission / reception occurs in the MII (Media Independent Interface) of each port. A reception expected packet part which checks whether the information of the transmitted Ethernet packet and the information of the Ethernet packet output after the Ethernet packet outputted from the physical layer drive unit 210 are switched via a MAC are matched with each other ( PHY_EXP_FIFO) 214 and an Ethernet packet multiplexer (EXP_ELEM_MUX) 208 that determines the routing from the source envelope 206 to the expected target envelope 214.

3 illustrates a process flow for testing Ethernet packet switching between a MAC and a physical layer using a physical layer virtually implemented according to an embodiment of the present invention. Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 2 and 3.

First, the Ethernet packet switching test apparatus 202 reads a file defining an Ethernet packet to be transmitted to the MAC through the MII from the Ethernet file unit 200 in step (300). Subsequently, the switching test apparatus 202 proceeds to step 302 and reads the file defining the Ethernet packet line by line at the time when the initial reset is inactive, and analyzes the source envelope 206 of the corresponding port. After storing in step 304, the process proceeds to step 304 to transmit the Ethernet packet stored in the source envelope 206 to the MAC through the corresponding port of the physical layer. Accordingly, the Ethernet packet is transmitted / received through the MII interface between the physical layer and the MAC. In this case, when the Ethernet packet is transmitted, packet information stored in the source envelope 206 is transmitted to the MAC and at the same time, an expected output port. Expected to be stored in the envelope 214. Subsequently, the switching test apparatus 202 proceeds to step 306 to store the Ethernet packet received from the MAC through Ethernet switching in the expected packet receiver 214, and proceeds to step 308 to the source packet receiver ( By checking whether the information of the transmission Ethernet packet stored in the 206 and the information of the reception Ethernet packet stored in the reception expected packaging unit 214 match, it is possible to examine the operation state of the Ethernet switching chip in which the MAC is integrated.

As described above, the present invention has an advantage in that the Ethernet switching chip is integrated with the MAC in the Ethernet network, so that a separate HDL for the MAC is not required for the virtual HDL for the test.

Claims (4)

An apparatus for testing Ethernet packet switching between a medium access control layer (MAC) and a physical layer using a virtually implemented physical layer, An Ethernet file section for storing a file defining an Ethernet packet, An ethernet read file drive unit for reading ethernet packet information from the ethernet file unit; A physical layer drive unit configured to drive Ethernet packets inputted from the Ethernet read file drive unit to respective ports of a physical layer and to transmit them to a MAC; A source packing unit for storing the Ethernet packet applied from the Ethernet read file drive unit for each corresponding port; A reception expected packet unit which checks whether the information of the transmitted Ethernet packet inputted to the physical layer drive unit and the information of a received Ethernet packet transmitted from the physical layer drive unit to the MAC and outputted after being switched to Ethernet are matched; Ethernet packet switching test device between the physical layer and the MAC characterized in that it comprises an Ethernet packet multiplexer for determining the routing from the source envelope to the expected target envelope. delete delete A method for testing Ethernet packet switching between a medium access control layer (MAC) and a physical layer using a virtually implemented physical layer, Reading the ethernet file that defines the ethernet packet, Analyzing the information of the Ethernet packet and storing the information in a source packet of a corresponding port; Transmitting the Ethernet packet to a MAC through a corresponding port of a physical layer; Storing the Ethernet packet received from the MAC through an Ethernet switching in an expected packet; And checking Ethernet switching by determining whether the information of the Ethernet packet stored in the source packet and the information of the Ethernet packet stored in the expected prediction packet is identical to the Ethernet packet switching test.