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

I have poor performance and high numbers of second port drops

 

Explanation: There may be a loop in the network and Spanning

 

Tree is not enabled.

 

Action: Avoid loops, or alternatively, either enable STP on all the

 

ports (using Device Setup) or specific ports (using Port

 

Setup).

 

Communication Problems

The most common

A high percentage of faults are caused by cable faults such as loose

problems are cable

connections or inappropriately wired cables.

problems

 

Management PCs using

A management PC using IEEE 802.1Q tagged frames may experi-

IEEE 802.1Q tagged

ence communication difficulties with the switch. To manage the

frames

switch from a PC connected directly to the switch, the PC must not

 

use frame tagging. To manage the switch from a PC with IEEE

 

802.1Q tagged frames, management must be through a device which

 

untags the frames.

Spanning Tree topology

When a change is detected in the Spanning Tree network, the devices

changes

forming the Spanning Tree go into a learning state to determine the

 

optimal routes between network segments. During this learning state,

 

the switch will not forward data traffic.

 

This is a normal occurrence for Spanning tree devices and no reme-

 

dial action is required. However, if the switch goes into the learning

 

state too frequently, the Spanning Tree may be unstable and should

 

be examined and possibly reconfigured.

To troubleshoot

If the POWER LED and the STATUS LED are both on, but one or more

communications problems

of the port STATUS LEDs are off, then:

 

1 Reset the switch using the Reset button.

 

2 Check the STATUS LED for each switch port to which a cable is

 

attached.

VLANs

The use of VLAN policies can lead to unexpected communication

 

problems. If the policies are not designed with care, ports are not able

 

to reach network services. Check your VLAN policies and use the

 

VLAN monitoring to review the VLAN membership for that port or

 

address.

114

Page 123 Page 125
Page 124
Image 124
Intel 520T manual Communication Problems
Page 123 Page 125

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.
Top Page Image Contents