Chapter 11: DOS Diagnostics

data is correct. After the test, the program reads back data one more time to insure the data stays correct. The test data used is 0x00000000, 0xFFFFFFFF, 0xAA55AA55, and 0x55AA55AA.

Address Test: Writes each address with unique increment data. Read back data to insure data is correct. After fill the entire data with the unique data, the program reads back data again to insure data stays the same.

WalkingOne bit Test: For each address, data one is written and read back for testing. Then shift the data left one bit, so the data becomes two and perform the same test again. It repeats for 32 times until the test bit is shifted out of test data. The same is test is repeated for entire test range.

Pseudo Random Data Test: A pre-calculated pseudo random data is used to write a unique data into each test RAM. After the first pass the test, the program reads back one more time to insure data stays correct.

Default: Enabled

B2. BD SRAM Test

Function: This test tests the BD SRAM. This performs exact the same way of testing as described in B1. Scratch Pad Test.

Default: Enabled

B3. DMA SRAM Test

Function: It tests DMA SRAM by performing the tests described in test

B1. The Scratch Pad Test.

Default: Enabled

B4. MBUF SRAM Test

Function: It tests DMA SRAM by performing the tests described in test

B1. The Scratch Pad Test.

Default: Enabled

B5. MBUF SRAM via DMA Test

Function: Eight test pattern data are used in the test. They are described below. A 0x1000 sized data buffer is used for this test. Before each pattern test, the buffer is initialized and filled with the test pattern. It then performs size 0x1000 transmit DMA from host buffer to NIC MBUF memory. Verify the data integrity in MBUF against host memory and repeat the DMA for the entire MBUF buffer. Then it performs receive DMA from NIC to host. The 0x1000-byte test buffer is cleared to zero before each receive-DMA. Verify the data integrity and test is repeated for the entire MBUF SRAM range. See Table 8 on page 123.

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Allied Telesis AT-2972T/2, AT-2916SX B2. BD Sram Test, B3. DMA Sram Test, B4. Mbuf Sram Test, B5. Mbuf Sram via DMA Test
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AT-2916LX10/LC-901, AT-2972SX, AT-2972SX/2, AT-2972LX10/LC-901, AT-2916SX specifications

The Allied Telesis AT-2972T/2 is a highly capable 10/100 Mbps Fast Ethernet switch designed to provide reliable performance and advanced management features for small to medium-sized businesses. This switch is built on a robust technology platform, making it an ideal choice for organizations looking to enhance their network infrastructure while ensuring scalability and flexibility.

One of the main features of the AT-2972T/2 is its support for 24 ports, allowing for extensive connectivity in a compact footprint. This makes it suitable for environments where space is limited but connectivity demands are high. With auto-negotiation on all ports, the switch automatically detects the best speed and duplex mode, ensuring optimal performance and seamless integration into existing networks.

The AT-2972T/2 incorporates advanced Layer 2 switching capabilities, enabling efficient handling of data traffic. Its ability to support VLAN (Virtual Local Area Network) tagging allows for network segmentation, improving performance and security. This feature is particularly beneficial for organizations that require different departments or teams to maintain their network traffic separately.

Quality of Service (QoS) is another significant aspect of the AT-2972T/2. The switch provides multiple traffic prioritization levels, ensuring that critical applications receive the necessary bandwidth to function effectively. This is essential in maintaining the performance of real-time applications such as VoIP and video conferencing, which are increasingly crucial in today’s business environment.

The built-in diagnostics features of the AT-2972T/2 enhance its reliability and ease of management. With capabilities such as loop detection and port mirroring, network administrators can quickly troubleshoot issues and monitor traffic flow to ensure a stable network.

Power over Ethernet (PoE) support is available in some configurations of the AT-2972T/2, allowing the switch to deliver power to connected devices such as IP cameras and wireless access points. This capability simplifies installations and reduces the need for additional power sources, streamlining the deployment of network devices.

Furthermore, the switch is designed with energy efficiency in mind, adhering to environmental standards that help organizations reduce their carbon footprint while cutting energy costs.

In summary, the Allied Telesis AT-2972T/2 stands out as a versatile and robust Fast Ethernet switch, equipped with essential features like VLAN support, QoS, PoE, and advanced diagnostics. Its combination of performance, management capabilities, and energy efficiency makes it an excellent choice for businesses aiming to build a reliable and future-proof network infrastructure.
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