To reduce design complexity and enhance versatility and compatibility, computer networks are designed as hierarchies. This hierarchical system enables a variety of different hardware systems and software systems to easily connect to the network. When analyzing and troubleshooting network faults, administrators should make full use of the layered features of the network to quickly and accurately locate and eliminate faults. However, in the actual
I. Network Complexity
General networks include routing, dialing, switching, video, WAN (ISDN, frame relay, ATM ,...) , LAN, VLAN ,...
Ii. Fault Handling Model
1. Define the Problem)
Detailed and accurate description of fault symptoms and potential causes
2. collect detailed information (Gather Facts) R> Source: key users, network management systems, routers/Switches
1) identify symptoms:
2) Repeat the fault: The verification fault still exists
3) fault frequency investigation:
4) determine the f
In an object-oriented program, the largest switch/case statement I've ever seen has more than 20 conditions. During the run, the code module executes all the conditions each time. Each condition is responsible for creating a new object that is used to communicate with the external use of the application API. After performing some general troubleshooting on one of them, I began to look at the interfaces implemented by the application. To my surprise, e
Believe that many users have encountered the power switch, the fan works but the computer does not start, for the system after the boot of a small number of problems, most users can also be resolved, but encountered even on the boot can not start the problem, most users do not know where to start to solve. In fact, the computer can not start the failure of the normal troubleshooting is not difficult, today small series on the fan work but the host can
Compared with a PC, the probability of a server failure is much lower, but the loss caused by the failure is also large. As a server maintenance personnel, they need to know some basic knowledge about server troubleshooting, know what they can do during maintenance to solve problems most quickly, and reduce the downtime of faults.
This document is not a complete manual for server troubleshooting. However, i
OSPFTroubleshooting report
Fault Point 1: PPPLink fault
Fault symptom:
The PPP link between R2.
Fault analysis:
1) whether the PPP authentication types are consistent
2) whether the user configured for ppp chap authentication is correct
3) is the pppp chap authentication password correctly configured?
4) whether the user performing CHAP authentication includes the PPP service type
Troubleshooting:
1) Use "display current-configuration int S0/1/0" on
Software TestingMedium,Troubleshooting(That isDebugging. The test is successful because an error is found. Identify the cause and location of the error based on the error signs, and correct the error mainly relies on the troubleshooting technology. 1. troubleshooting Process As shown in, the troubleshooting process b
ISA Server Troubleshooting Policy
10.2 ISA Server Troubleshooting Policy
The system method is a necessary condition for successful troubleshooting. When an unexpected ISA Server error is encountered, it is possible to troubleshoot by identifying whether the error is based on a user or a packet. This section provides troublesh
and the expansion of college enrollment, network users are increasing, and the problems brought by network failures are becoming more and more prominent. Therefore, to ensure the stable operation of campus network, familiar with a variety of possible points of failure, rapid positioning and troubleshooting, to ensure the normal teaching, research and management of the university is of great significance.
1 Campus network operation and Maintenance ov
Label:Original: SQL Server 2008 Performance Troubleshooting (i)--IntroductionRemark: I spent a lot of work time translation, no plagiarism, allow reprint, but please indicate the source. Because of the length, not a post all finished, but also not so fast all translated, so according to the chapter published. Due to my limited level, translation results must be problematic, in order not to mislead, at the end of each attached to the original text for
In the daily use of switches, There will be various problems. The first problem is that the environment is wet, the circuit board is damp and short-circuited, or the components are due to high temperature and other problems, the following article describes the classification and troubleshooting of switch faults.
Common switch fault categories: Several smart solutions are provided. The following describes switch fault categories and common fault soluti
The instance explains network cable faults during ADSL fault handling. The configuration of ADSL Fault Handling mainly describes the similarities and differences between the network cable fault and the indicator lights of ADSL. The configuration can be completed easily, there is no difficulty. Hurry into the Wireless World.
Instance 1: network cable failure
Fault description: multiple computers share the Internet with the ADSL Fault Handling Modem through the Hub. Check the local connection. The
switch is moved, or when the power supply is unstable.Of course, the three modules mentioned above have external interfaces, which are easy to identify. Some modules can also identify faults through the indicators on the module. For example, a stacked module has a flat trapezoid port, or some switches have interfaces similar to USB. The management module has a Console port for establishing a connection with the network management computer to facilitate management. If the expansion module is con
Switch troubleshooting: a layer of equipment is used to help the detector. You are very interested in troubleshooting the switch. Before giving you a detailed description of how to troubleshoot a vswitch, let's first take a look at a layer of equipment, such as a hub, to help the monitor collect the required information.
Since the vswitch is a layer-2 device, it cannot forward all information traffic. So le
Summary of IE solution (troubleshooting)
Author: anonymous author: network updated on:
Summary of IE solution (troubleshooting) 1. Exclude garbled web pages. Some friends asked me why I often see garbled characters on the webpage when I access the internet? In fact, there are two kinds of problems: one is caused by impro
After receiving help from the customer, we recently conducted a network "visit ". This is a network fault caused by a DDos attack on the slave host. It is a typical case and the troubleshooting process is also twists and turns. I will restore the process and share it with you.
1. Network Environment
This customer is a chemical company with a small network size. A lan consisting of more than 10 switches has about 150 nodes. No VLAN division.-Some hosts
I am not sure whether you have mastered the essence of this series of articles about DHCP troubleshooting. Some friends may still be confused. Next, let's list the DHCP protocol Fault Handling Cases to help you analyze them.
The IP address obtained by the client from the DHCP server conflicts with the IP address of other hosts.
DHCP protocol troubleshooting ◆ Network Environment
When the client obtains an I
Next, we will introduce the Group Policy troubleshooting knowledgeGroup PolicyTroubleshooting knowledge. The specific content is as follows.
Step 2: Check the infrastructure to troubleshoot problems in the core execution phase
Next, let's talk about the failure of the core execution phase indicated by the Group Policy result wizard, that is, the status of the Group Policy infrastructure component is displayed as Failed ). Such failures usually indicat
In this Document
Purpose
Troubleshooting Steps
References
Applies To:Oracle database-enterprise edition-version 8.0.6.3 and laterinformation in this document applies to any platform.PURPOSEThe purpose of this document are to provide some steps to take to gather some essential information necessary for initial a Nalysis of ORA-4031 errors on the
after AM (such as am to am ~ Logs generated at are usually less than 10 seconds to one minute.
(2) The rotation time (rotate time) after Log File Processing per minute, the rotation time of the entire point is much longer than other times, and the rotation time at the end of the whole day is the longest.
The preceding statistics indicate that the processing latency of the real-time computing engine is within the first half of the hour after the rotate rotation at the entire point. The
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