Ping always lose packets

This phenomenon is caused by many reasons, the configuration is certainly very important; but the following aspects of this phenomenon is also the root cause of the problem is the result of your passive, not as proactive as early as possible to reduce the problem, you may wish to press the following aspects of the careful examination of the = dredge the road to the various devices, the road dredged = your problem is not solved. ★ Copyright: This answer for the "harmony" original, no one shall steal! ★ a: grounding: grounding is mainly to protect the safety of people and equipment! Grounding is the most basic requirements to do IT, analog equipment is so, digital circuits is more so, interference from all sides can be abated or eliminated by grounding, foreign interference and local local pole of the wiring of the line coupling can be abated and eliminated, do a good job of grounding shielding of the equipment, a lot of interference from the shielding is not good and grounding is poor, a lot of people are only doing work on the software, a lot of interference is caused by the Poor grounding or no grounding caused by this failure is very easy to produce, but also easy to be ignored by many people, a lot of equipment damage and grounding is directly related to the lack of grounding or poor grounding can lead to error codes, delays, packet loss, intermittent, dropped (disconnected, interrupted), crash, automatic shutdown, repeated startup (or repeated with the connection) and other phenomena. Grounding must have more than two grounding electrodes, each grounding electrode between the minimum interval of more than 10 meters, grounding electrodes to the room of the grounding line shall not have any joints, respectively, with a cross-section of not less than 25 square millimeters of soft copper wire introduced into the room of the bus (intermediate is not allowed to have any joints), grounding line and Faraday network symmetrically connected in order to facilitate the diversion of the flow of the flow of the bus to the connecting point should be coated with silver conductive paste, the equipment to the Grounding wire cross-section of the busbar shall not be less than 4 square meters of multi-stranded soft copper wire, busbar grounding resistance of each grounding pole is less than 5 ohms (the smaller the better). At least two times a year using the grounding meter (2.5 level or above, the meter in the inspection period within the scope of the qualification period) check or more. When checking the grounding electrode, it is strictly prohibited to do so under thunderstorms. It is strictly prohibited to use the "N" zero line of the water pipe and power line as grounding; that is, an independent grounding device. Each piece of equipment is independently connected to the line in the room of the busbar, it is strictly prohibited to connect the busbar after the series connection. Second: wiring: wiring process to minimize interference as a principle; the requirements of wiring neat and beautiful, strong and weak signals to go separately, high and low-frequency signals to go separately, the wiring is not reasonable will produce coupling between the lines, crosstalk interference caused by the line can not be entangled with each other, it is best to use shielding (shielding layer is reliable and grounded) line, these parasitic interference will make the computer signal-to-heterodyne ratio is reduced and can not identify the useful signals that cause inter-coder interference, BER, delay, packet loss, intermittent, dropped (short or interrupted), crash, automatic shutdown, repeated startup (repeated connection) and other phenomena. Third: signal to noise ratio: (the ratio of signal to noise) is small, the useful signal is noisy spurious signals cover up no (especially between the code elements of the inter-code interference), so that the road to receive the letter can not be correctly extracted from the noisy signals to the useful signals, the judgment circuit can not be correctly judged on the code elements, it will produce a loss of packet loss, serious loss of packets is the reason for the delay, severe delays will be is the drop (will be) Produce slow, delayed, repeated startup, drop, delay, drop, interrupt, disconnect, automatic shutdown, crash and other manifestations, etc.), the use of noise meter or level meter to measure the noise level is within the permissible range, or with an oscilloscope to observe the presence of spurious signals? Is there any inter-code interference between codes? Take measures to eliminate. Spurious ratio should also be greater than 60dB or more. Fourth: Matching: Matching includes level matching and impedance matching 4.1 level matching: the received signal can not be too low, too low, up to the threshold level needed to receive the road amplitude, the equipment can not work properly; level is too high will make the road to receive the pre-circuit saturated or burned pre-circuit. Receive level fluctuations in the receiving threshold near the computer will make frequent repetitions of the restart phenomenon; therefore, the receiving level adjustment is very important. Operation should always use a level meter or oscilloscope, monitoring, adjusting the connection of the receiving level in the appropriate range of amplitude. 4.2: impedance matching: the connection must be done to match the relative impedance, input and output impedance mismatch will lead to reflective attenuation, the signal and then the strongest can not work. V: temperature, humidity, temperature rise (the temperature after the start-up in the gradual increase) humidity: rainy season or rainy days and its high humidity areas, the insulation between the line and the device is reduced, the signal level falls, resulting in computer inter-code interference, mis-coding, delays, packet loss, intermittent, dropped (short or interrupted), crash, automatic shutdown, repeated start (repeat connection) and other phenomena, or unstable work. Humidity accelerates oxidation, resulting in transmission interruption.

Temperature (especially in summer, high daytime temperatures, low nighttime temperatures): from the beginning of the boot, the temperature has the ambient temperature in the gradual increase in temperature to a certain point, will be stabilized in the value of this value, the difference between this value and the ambient temperature should not be greater than 25 degrees, due to the computer belongs to the semiconductor device, therefore, requires that the device temperature shall not be higher than the actual temperature of 85 degrees; the chip temperature is close to 80 degrees to be Take measures to reduce the cat, router, network switches and computer equipment operating environment temperature. If this range is exceeded, the computer will produce inter-code interference, error codes, delays, packet loss, intermittent, dropped (short or interrupted), crash, automatic shutdown, repeated startup (repeated connection) and other phenomena. Temperature rise (the difference between the actual temperature of the device and the ambient temperature is called temperature rise) is less than 25 degrees Celsius Temperature has a great impact on the normal operation of the device, especially network switches, routers, computer motherboard chips, network cards, etc. When the temperature rise is large, the device will not be able to run; in particular, the hand-held (also known as laptop) computers, due to the design of priority consideration of the size of the temperature of the heat dissipation of the difficulties that are most likely to occur as a result of the rise of temperature Inter-code interference, error codes, delays, packet loss, intermittent, dropped (short or interrupted), dead, automatic shutdown, repeated startup (repeated connection) and other phenomena caused by temperature rise are most likely to occur. The measures are as follows: 5.1: Place the equipment (meaning: Hubble, cat, router or network switch, computer, etc.) in a safe place for people, first disconnect the power supply, and then open the box cover of the equipment, and use air convection to strengthen the contact with the air for natural heat dissipation;

5.2: Add a miniature fan to the equipment to increase the convection of the air, and forcibly dissipate the heat;

5.3: If you're in IT, I'd recommend: disconnecting the power supply and adding heat sinks to the heated parts of the device.

5.4: After the equipment is disconnected from the power supply, use a 3 mm drill bit to drill more holes on the top and bottom of the equipment to strengthen the air convection and improve the heat dissipation conditions; 5.5: the equipment to a ventilated and dry place, and it is best to make an (there are also used for laptops in the market) insulated cooling bracket to support the equipment for natural heat dissipation; 5.6: After the computer is used for a long time, the CPU and the heatsink between the When the silica gel dries up, the CPU will heat up seriously, which will produce packet loss, delay, slow, repeated startup, dropped, interrupted, disconnected, automatic shutdown, crash, and other phenomena. Re-coating the silicone will restore normal operation.

C: timely removal of Internet generated garbage debris and IE cache: as long as you use the computer will produce garbage, do not clean up in a timely manner, the more it will accumulate more and more, a long time to not clean up the C disk space will make the operation of the C disk space more and more small and cluttered, and finally gradually slow down, until the computer is dead; therefore, the C disk on a regular basis to organize the operation of the computer, you can maintain computer operating speed.

D: First, let the ADSL device synchronization: the device is powered off and restarted. Sixth: optimize the network structure people open the computer to surf the Internet will produce garbage as dinner, do not clean up the table, do not scrub the dishes, do not clean the stove will produce computer garbage, the computer will gradually manifested as slow, card, delay, repeat startup, drop out of the line and other malfunctions; therefore, I personally recommend the use of a number of gadgets: for example, Super Bunny, Optimizer, LU Master or 360, etc.; to clean up the good habits of garbage before going offline. 6.1. 6.1: Timely removal of Internet generated garbage debris and IE cache: as long as you use the computer will produce garbage, not timely cleanup, will accumulate more and more, a long time to not clean up the operation of the C disk space is getting smaller and smaller and cluttered, and finally gradually slowed down to the point of death; therefore, regular organization of the operation of the C disk, you can maintain the speed of the computer operation.

6.2: First, let the ADSL device synchronization: power off the device and restart. VII: Software settings and configurations Use stable and mature software; download software as far as possible to the big official website to download, to do 3 do not install, informal software does not install, P2P (resource-hogging) software does not install, not commonly used software does not install. Turn off all unnecessary network connections and startup items, such as Xunlei BT donkeys, etc.; non-running software should not be placed in the running c disk inside; real-time update patches. Game software overwhelmed regular large-scale website to download, pay attention to whether the software is stable, if it is not stable to delete immediately; download software, pay attention to the rogue software to take the opportunity to insert the crisis of the computer's security, at any time to give the removal. Eight: antivirus software and firewall At least one effective and genuine antivirus software and often upgrade the virus database: firewall settings are appropriate (not too much, too high, too low); viruses can make the computer slow down, crash, drop out, card, repeat startup and switching failures. IX: Connection contact and good insulation 9.1 network cable and crystal (R45) head: crystal head and seat is plugged (loose?)? Is the contact good? What is the contact resistance? Is there any accumulation of dust? Is it oxidized? Is the mechanical lock between the crystal head and the seat locked? Is the latch secure? Are the network cable and the crystal head compressed and in good contact? The insulation resistance between the wires of the network cable (using a 100V rocking meter), should be greater than 20 megohms.　9.2: Click on the computer, and then open the device manager, find the network adapter point deactivate, and then start, may be good.

9,3: frequent Internet users up to six months, to power off and open the device's shell (by the way, check whether the device's internal connection is good, whether the memory stick is loose, memory stick and card slot contact is good? Are the plug-ins loose? Is the plug tight? The device is not connected to the card slot, the memory stick is in good contact with the card slot. ★ Copyright: This answer for the "harmony" original, no one shall steal! ★ Ten: power supply Is the power supply stable? Is the AC voltage fluctuation within the allowable range? Is the ripple coefficient after A/D conversion power supply qualified? Is the temperature rise of the power supply abnormal? Are the voltage stabilization characteristics in accordance with the technical specifications? Do the voltage stabilization characteristics and ripple coefficient under rated load meet the technical specifications? Due to equipment over-voltage (want to feed the child as much as, more can hold up), low voltage (want to feed the child as much as, less will be malnourished), voltage fluctuation is too large (as to give the child to eat, hungry, full of a meal of indeterminate amount), overcurrent, heat, resulting in thermal protection action cut out the fault and will be the equipment out of operation (i.e.: it will produce a slow, delayed, repeated startups, delayed, dropouts, interruptions, disconnections, (i.e.: will produce slow, delayed, repeated start-up, delay, dropouts, interruptions, disconnections, automatic shutdown, crash and other manifestations), etc.; XI: the motherboard's button battery Battery capacity is not enough or no power, but also can not be turned on or produce other faults. XII: ADSL users: multiplexing computer signals with the phone line, pay attention to the take, hang up, ringing three states of the computer's impact; due to the computer and telephone signals are in the phone line (multiplexing) transmission, the two must provide a certain degree of isolation (greater than 60DB0), the degree of defense should be greater than 60db (the greater the better), especially some informal words will affect the computer's Use. Thirteen: Timing failure: equipment failure at a fixed time, to carefully around and between its transmission path whether there is a large factory or timed large electrical equipment startup, welding and other startup equipment. As long as you carefully in accordance with the above to do, and keep often do, your equipment work smoothly, your mood is comfortable; configuration is not high computer, but also can make you very satisfied; otherwise: the configuration of the computer will be the same as the high frequency of failures; like a person wearing clothes (skit: the good guys and the bad guys in the Chen Pesi: you give him even better clothes, he can not be on the grade!) Like people wearing clothes (Chen Pesi in the skit: good guy and bad guy: you give him good clothes, he can't even get into the class! No matter how high you configure your computer, if not in accordance with the computer safety maintenance and use of methods to use, you will fail constantly, accidents happen frequently. Many of the failures are man-made, things are people! ★ Copyright: This answer for the "harmony" original, no one shall steal! ★

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