Chapter 11: DOS Diagnostics

C3. DMA Test

Function: Both high and low priorities DMA are tested. It moves data from the host memory to NIC SRAM, verifies data, and then moves data back to the host memory again to verify data.

Default: Enabled

C4. MII Test

Function: The function is identical to A2. Control Register Test. The test writing zero and one into the test bits to insure the read only bits value are not changed, and read/write bits are changed accordingly.

Default: Test Enabled.

The test attempts to read the register configuration file ‘miireg.txt’ for the register defines. If the file does not exists, the following table is used. See Table 9.

Table 9. Default Register

Offset

R/O Mask

R/W Mask

 

 

 

 

 

 

0x00

0x0000

0x7180

 

 

 

0x02

0xffff

0x0000

 

 

 

0x03

0xffff

0x0000

 

 

 

0x04

0x0000

0xffff

 

 

 

0x05

0xefff

0x0000

 

 

 

0x06

0x0001

0x0000

 

 

 

0x07

0x0800

0xb7ff

 

 

 

0x08

0xffff

0x0000

 

 

 

0x09

0x0000

0xff00

 

 

 

0x0a

0x7c00

0x0000

 

 

 

0x10

0x0000

0xffbf

 

 

 

0x11

0x3300

0x0000

 

 

 

0x19

0x001f

0x0000

 

 

 

0x1e

0x0000

0xffff

 

 

 

0x1f

0x0000

0xffff

 

 

 

124

Page 124
Image 124
Allied Telesis AT-2972LX10/LC-901, AT-2916LX10/LC-901, AT-2916SX, AT-2931SX manual C3. DMA Test, C4. MII Test, Offset Mask

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.