Spanning Tree

C H A P T E R 3 Standard Configuration

Purpose

Warning when using VLANs

4Click the required parameter.

5Type the percentage of errors or runts.

6Click OK.

You can change the:

•Priority given to the switch

•Maximum length of time information is retained by the switch

•Time between transmitted Configuration BPDUs

•Time the switch spends in the Listening and Learning states

It is important to be aware of problems that may arise when using Spanning Tree and VLANs. The Spanning Tree can use alternative paths (such as different ports) to get messages to their destination.

VLAN		STP
A B		STP
A B

Intel Express

520T Switch

	Intel	Express
	520T Switch
A	B
VLAN

	Intel	Express
	520T Switch
Switch 1
W	X
Y	Z
	Intel	Express
	520T Switch
Switch 2

1737

Why change these from their defaults?

The diagram above, shows two switches. On the left, we see the two switches connected and the ports are grouped in two VLANs: A and B. On the right, we have enabled STP; STP blocks the path between X and Z (to avoid looping) and, therefore, destroys the VLAN setup (because VLAN B needs these ports to receive messages).

The switch is delivered with Spanning Tree default values set to those recommended by the IEEE 802.1d standard. These values are conser- vative worst-case estimates for LANs consisting of a large number of switches. Therefore, changing these default values may improve the performance of your network.

520T specifications

The Intel 520T is a well-regarded member of Intel's Xeon processor family, designed primarily for entry-level servers and workstations. Built on the 32nm manufacturing process, the 520T is based on the Nehalem microarchitecture, which has paved the way for improved performance and efficiency in data processing tasks.

One of the standout features of the Intel 520T is its energy efficiency. With a thermal design power (TDP) of just 35 watts, it provides an excellent balance between performance and power consumption. This characteristic makes it particularly suitable for environments where energy costs are a significant concern, such as in data centers or small business server applications.

Equipped with four physical cores and hyper-threading technology, the 520T allows for eight threads of execution, enabling it to handle multi-threaded workloads effectively. It operates at a base clock speed of 2.2 GHz and can achieve turbo boost frequencies up to 2.5 GHz under optimal conditions, ensuring that it provides the necessary performance for demanding applications.

The processor supports Intel's trusted execution technology and virtualization technology, maximizing both security and performance in virtualized environments. This capability allows multiple operating systems to run simultaneously on a physical server, making it an excellent fit for businesses looking to optimize their assets through virtualization.

The Intel 520T also features Intel's QuickPath Interconnect (QPI) technology, which provides a high-speed connection between the processor and other components, such as memory and storage. This feature helps minimize latency and maximizes bandwidth, enhancing overall system responsiveness.

In terms of memory support, the processor can handle up to 32 GB of DDR3 RAM, providing ample capacity for demanding applications. The 520T also supports ECC (Error-Correcting Code) memory, which is vital for mission-critical applications that require data integrity.

Security enhancements are another noteworthy aspect of the Intel 520T. With built-in security technologies, including hardware-based random number generation, the processor helps safeguard sensitive data and contributes to more secure computing environments.

Overall, the Intel 520T stands out as a robust option for users seeking an efficient server-grade processor capable of delivering strong performance while maintaining a low power profile. Its array of features, technologies, and characteristics make it a reliable choice for various computing needs.

Intel 520T manual Spanning Tree

Models: 520T

Spanning Tree

520T specifications