Solutions to common problems in network management

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. Computer knowledge

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, etc., the server should choose suitable for concurrent data request SCSI interface. Currently the more popular SCSI interface has FASTWIDE20MBP data transmission rate) ULTRAWIDE40MBPULTRA2WIDE80MB

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

3, the hard disk array card can greatly improve the read and write performance and security of the hard disk, 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 of files read and write extremely frequent workstations, when the server only installed to form a separate network segment, the network segment all the 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.

Wan 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. Basic knowledge of the computer

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.