Common problems and solutions in network management

Network management is to make the network reliable, safe, efficient operation of the protection. Modern network management focuses on the development of communication technology and information processing technology in all aspects of the results of the different management functions of the network to play a role in the common implementation of network management tasks.

Network management has a lot of skills and tips, the following describes some of the network management of common problems and solutions, hoping to play a role in the introduction.

Configuring switches

The switch port is configured to 100M full duplex, the server installs a intel-l00m network card, after the installation of all normal, but in large flow data transmission, the speed becomes extremely slow, finally found that the original network card does not support Full-duplex. Failure disappears after changing switch port to Half-duplex This indicates that the switch port and network card speed and duplex mode must be the same. At present, there are many adaptive network cards and switches, according to the principle, should be able to automatically adapt to speed and duplex mode, but in fact, because of brand inconsistency, often can not correctly achieve Full-duplex. At this point, you need to modify the configuration, forced to set duplex mode to resolve. Network and hard disk

The teachers who have done network management know that the bottleneck of the network based on file access and printing is neither the switch nor the NIC, nor the CPU or memory of the server, the bottleneck of the whole network is the speed of the server hard disk. So configure your server hard disk for the performance of the network will play a decisive role. There are several main factors to consider:

1. The hard disk interface has IDEEIDESCSI and so on, the server should choose the SCSI interface suitable for concurrent data request. Currently the more popular SCSI interface has FASTWIDE20MBP data transmission rate) ULTRAWIDE40MBPULTRA2WIDE80MBP

2. The faster the speed of the hard disk, read and write data faster, the server should choose 7200/10000rpm hard disk.

3. Hard disk array card can greatly improve the read and write performance and security, of course, the cost will be higher.

4. The same SCSI channel, do not use Low-speed SCSI devices (such as CD-ROM and hard disk sharing, otherwise the performance will be significantly reduced.)

Network segment and Flow

A local area network has two files read and write extremely frequent workstation, when the server installs only one network card, forms the individual network segment, this network segment all equipment response is very slow. When the server installed two network cards, formed two network segments, the two files read and write the most frequent workstations are connected to different network segments, the network of all equipment response speed has been significantly improved. This is because the increased network segments share the original more concentrated data flow, thus increasing the network response speed. WA N and grounding

Accidentally plug the router's power plug in the mains socket, the result 64KDDN line is unable to connect. The Telecommunications bureau to check the line is very normal, and finally check the power of the router grounding voltage, found wrong, switch back to the UPS socket, everything back to normal.

The power plug of the router is broken, causing the data packet is often lost, ping operation, when the Shitong, replace the power cord after all normal. WA N Connection because of the remote line, so the grounding requirements more stringent, so as to ensure a strong anti-interference, to achieve the specified connection rate, otherwise there will be strange fault.