Switch Management and Operating Concepts

Priority

The ZT 8101 switch allows you to assign specific levels of priority to traffic traversing the switch. Setting priority allows you to protect bandwidth for important nodes on your network. Traffic in the switch can be prioritized any of the following ways:

•MAC Address

•TCP/IP address

•Physical Port

•802.1p Priority Bits

Frames that match the user defined criteria are given a priority tag. The switch supports four hardware priority levels per egress port, so the eight levels (0-7) of priority are mapped to four hardware queues (0-3) as listed in the table below.

Priority in Frames

Priority Queue of ASIC

 

 

0-1

0

 

 

2-3

1

 

 

4-5

2

 

 

6-7

3

 

 

Note: 0 is the lowest priority, 7 is the highest priority

After an Ethernet frame has been prioritized, the switch forwards the Ethernet frame using the strict priority-based scheduling algorithm. With this algorithm, any frames residing in a higher priority queue are always transmitted first. Only when these queues are empty are frames in lower priority queues transmitted.

It is important to note that this function does not overwrite the existing priority tag on the frame by default. Instead, the class of service only affects packets inside the switch. The frame retains the original priority tag value on the egress port.

The switch is capable of overwriting and setting a new priority value in the frame on egress, but will only do this if User Priority Regeneration is configured on the switch to do so. When User Priority Regeneration is enabled, the 802.1p priority information that is set for the egress frame is defined by user.

Prioritization Methods

•MAC Address— Allows frames to be prioritized based on whether the MAC address is:

—Source only

—Destination only

—Source or Destination

•IP Address— Allows packets to be prioritized based on whether the IP address is:

—Source only

Intel® NetStructure™ ZT 8101 10/100 Ethernet Switch User’s Manual

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Intel ZT 8101 10/100 user manual Prioritization Methods, Priority in Frames Priority Queue of Asic
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ZT 8101 10/100 specifications

The Intel ZT 8101 10/100 is a highly regarded network interface controller designed for efficient data communication in both home and enterprise environments. This versatile chip offers robust support for various networking technologies, making it suitable for a wide range of applications.

One of the most significant features of the Intel ZT 8101 is its capability to operate at both 10 Mbps and 100 Mbps, allowing for seamless integration into existing networks. This dual-speed functionality ensures that users can enjoy the benefits of faster data transfer rates while still maintaining compatibility with legacy hardware. The device automatically detects the network speed, facilitating a plug-and-play experience that minimizes user intervention.

The Intel ZT 8101 utilizes advanced features such as full-duplex support, which enables simultaneous data transmission and reception. This capability significantly enhances network efficiency and maximizes throughput, making it ideal for environments with high data traffic. Moreover, the chip employs sophisticated packet processing algorithms to prioritize data, reducing latency and ensuring smoother communication.

In terms of power efficiency, the Intel ZT 8101 is designed to consume minimal power, making it a suitable choice for energy-conscious applications. Its low power consumption allows for more efficient operations, contributing to overall system stability and longevity. Additionally, it incorporates power management features that can dynamically adjust the power usage based on network demand.

Another notable characteristic is the integration of hardware-based flow control, which helps prevent data packet loss during high-utilization periods. This capability is essential for maintaining the integrity of data transmission in busy network environments. The chip’s robust error detection and correction mechanisms further enhance data reliability, minimizing the chances of transmission errors.

The Intel ZT 8101 supports various network standards, including IEEE 802.3 and IEEE 802.3u, ensuring compatibility with a wide range of Ethernet devices. Its flexibility makes it an excellent choice for network upgrades, expansions, or new installations, allowing users to tailor their network infrastructure according to specific needs.

In summary, the Intel ZT 8101 10/100 network interface controller stands out for its dual-speed support, energy efficiency, and advanced networking features. Whether for home users looking to improve their network performance or businesses seeking reliable data communication solutions, the ZT 8101 represents a compelling choice that combines technology, reliability, and efficiency. As network demands continue to evolve, this Intel chip remains a fundamental component in many networking scenarios.
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