Useful Tips

How to check for packet loss

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If you are not sure why the Internet began to work more slowly:

  • computer, laptop,
  • accident on the side of the Internet access service provider,
  • low speed due to increased network load

We check the bandwidth of the local connection and the network adapter in conjunction (for usb modem, Wi-Fi hot spot - the principle is the same) - first we ping the modem-router (router), the address, most often, is 192.168.1.1 or 192.168.0.1 we determine the presence of a computer-modem connection. If there is no ping, we determine in which section the failure.
It could be:

  • the modem is not turned on, the network cable is missing or not connected, it is not correctly configured,
  • the network card is out of order, or the driver is not installed,
  • The modem has failed, or is not configured correctly.

Then for self diagnostics of internet connection we ping any known ip address or domain by the domain name (ping tut.by -t), you can also use the address of the famous Russian portal mail.ru - 94.100.191.204 (in case you suspect problems with DNS servers, you can use the Google public DNS - 8.8.8.8).

If diagnosing an Internet connection causes certain difficulties, call the provider, and then the computer service. So faster and more reliable.

We press Win + r on the keyboard (two WIN and R keys at the same time), and insert mai.ru -t into the window. Press ENTER.

Sometimes it is better to enter a known domain ip address, thus eliminating possible problems with the DNS server service.

A console window should appear, as in the picture, in it the server ip address, packets, ping-.

Of all that is in the window, we are only interested in a regularly appearing line: the answer is from 94.100.191.204. The network adapter is turned on, the Internet is configured.

  • Let's check the packet loss in the network and the settings of the LSP transport protocols.

Click win + r on the keyboard and in the window “Run” write: cmd. Enter In the console that appears, type: ping mail.ru. Hit Enter.

Now we pay attention to the line highlighted in white: Packets: sent = 4, received = 4, lost = 0. There should be 0% loss (subject to the availability of high-quality Internet and a correctly configured firewall).

  • Pay attention to the inscription in square brackets after - “Exchange packages with mail.ru ...”.

This name instead of the ip address, as in the picture below, indicates a violation of the Windows Sockets system.

To eliminate the inoperability of Windows Sockets, as well as the associated packet loss on the network, use the AVZ utility.
Download. Install. We start. We are updating.

Further “Service” - “Winsock SPI Manager” - “Search for errors” - “Automatic correction of found errors”.
Reboot the computer.

If there is no ping, you need to find out at what level the problem is and try to fix it. It can be a computer network card, an ADSL modem provider, Internet settings (network adapter settings, vpn connection, etc.):

  • is the network card turned on (if not, open the device manager and enable it,
  • whether ip address, gateway, dns are configured,
  • Does the network card link-driver installed in the system work correctly. For these purposes, it is best to install a known working one, or a “native” driver for the network card from the driver disk that came with the device when you purchased a computer. If you doubt the operability of the installed network adapter, you can try installing a discrete new network card or a known working one,
  • make sure that there is no malware or virus software on the computer - scan with the healing utilities and remove all viruses,
  • reset the adapter - in Windows 7, right-click on the network icon in the tray near the clock - “Diagnosis of problems”, in Windows XP - “Fix Connection”,
  • Call the service if nothing helps. Hold fast diagnostics of internet connection, setting up a Promsvyaz M200a modem, any wireless access point, installing a driver for a network card, ringing network cables for our master is a common thing.

Instruction manual

1. Use the ping utility, which is part of the standard operating system programs, to determine the number of lost packets. It is prepared specifically for checking the quality of network connections based on the TCP / IP protocol. The utility will send test requests (ICMP Echo-Request) to the node, the one you specify to it, and record the fact of acquisition or lack of results (ICMP Echo-Reply). For the entire sent request, the utility also shows the time between sending and acquiring the result.

2. Launch a command line terminal. To do this, use the program launch dialog, the one that is called by the “Run” command, located in the main menu on the “Start” button, or by pressing the win + r key combination. In the dialog, type cmd and press Enter.

3. Type ping on the command line and enter a domain name or ip-address of the node with a space, the quality of communication with which you are concerned. After that, press Enter and the utility will start sending test packets, displaying a line-by-line report on all the result. At the conclusion of the process, the number of sent packets and the percentage of losses, as well as the average time between sending and acquiring, will be displayed in the terminal window.

4. Use the -n switch to specify the number of packets in a series if the default value of four packets does not suit you. This key must be specified later than the address of the pinged node, separating it with a space, and later the key, and also with a space, you must enter a numerical value. For example, to send 12 packets to google.com, you need to enter the following command: ping google.com -n 12.

5. Type ping /? and press Enter if you want to get more detailed help about additional parameters that can be used with this utility.

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