Recovering from Start-up Failure

C H A P T E R 7 Console Port Use and Troubleshooting

Recovering from Start-up Failure

Network boot process

The network boot process is as follows:

1. The switch sends a BOOTP request over the network.

Switch

Boot

Server (TFTP)

Boot Request

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The boot request contains the switch’s MAC address. The boot server contains a bootptab file with an entry for the switch which is defined by the MAC address.

2.If a boot server which holds the software for the switch receives the boot request, it loads the boot software over the network to the destination MAC address.

Switch

Boot

Server (TFTP)

Software download

	Using Maintenance Mode
Purpose	Maintenance Mode offers three facilities:
	• It allows you to force the switch to load a specified software file
	from any specified TFTP server.
	• It provides an emergency facility to force boot the switch from a
	specified boot server if the switch cannot boot from Flash Mem-
	ory. From Maintenance Mode the switch is forced to issue a

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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 Recovering from Start-up Failure, Using Maintenance Mode

Models: 520T

Recovering from Start-up Failure

Using Maintenance Mode

Maintenance Mode offers three facilities:

from any specified TFTP server.

ory. From Maintenance Mode the switch is forced to issue a

520T specifications