万能的ping

基本上遇到的所有的网络问题，都会问一句，你ping了吗？

ping是一种常见的拒绝服务式的请求，用于测试在线状态，如果可以ping通，说明你还活着，如果不通，说明你挂了，这个命令非常的实用。下面来举几个常见的场景

1、ping 打印机如果你的电脑安装你打印机不能打印，不妨ping一下打印机，看打印机是否没有开机，或者你的网线没有插

2、ping DNS这个是用来测试你使用的是哪个运营商的网络，无非就是电信的，移动的，联通的，长城的网络，还有一个就是通过ping DNS检测在你所使用的局域网里头有谁在使用bt下载工具，或者大的数据传输等等

3、ping 网关这个命令的作用可是大得很的，一般要有个3~4年经验的人常用的网络排错方法。刚出来工作的人新手很多东西可能比较的模糊，不够清晰，只知道就是要这么做，就是不清楚为什么要这样做，这是非常能够理解的，这个东西的价值与意义在于你实用的频率及你自己的感悟而来的，经常使用你肯定会去分析，这个东西什么要这么使用，你肯定会自己去找答案，当然还是自己摸索得到的要好，网上的东西仅仅作为参考，机械的描述总是没有切肤的感受深刻

ping网关是从源头解决问题，我们要知道网关的作用是干嘛的，网关是一个门，一个通向外界的门，所以网关的内部是局域网，外部是互联网，如果你ping网关都不同，那么说明路由器这里存在问题了，要么关机，要么网线接口被谁拔掉或者线被老鼠啃掉，如果以上问题都没有，看看连接你的路由器的光纤设备是否正常的供电，线是否被震断，如果断了，就打电话找网络运营商过来抢修，有时候施工也会把光纤弄断的，这样的情况虽然不多，但是有发生过，当年我遇到过的，现在才更加深刻的理解当初为啥要ping网关

如果网关可以ping通，再ping核心交换机的管理IP地址，依次再ping汇聚层交换机的管理IP地址，再ping你所在网段的网关地址，大概的思路就是这样的，这是从自上而下的排查，对我来说这个方法是适用的，说直白点就是动手操作，然后再形成自己的东西

其它的服务器如何不能上网，也是一样，排查服务器的网关地址

ping接的参数

ping 202.103.24.68 -t 连续ping

ping 202.103.24.68 -n 100 ping包等于100

ping默认ping就4个包结束了，ping包也是占用流量的，如果有最好的配置的电脑，打开足够多的cmd，集结足够多的人，可以把淘宝网搞挂掉，这个其实是蛮厉害的，不要小看蚂蚁的力量，蚂蚁多了你大象也奈何不了，仅仅幽默乐一下

Basically, all the network problems you encounter will be asked, did you Ping?

Ping is a common denial of service request, which is used to test the online status. If you can ping, it means you are still alive. If not, it means you hang up. This command is very practical. Here are some common scenarios

1. Ping printer if your computer is installed and your printer cannot print, you may as well Ping the printer to see if the printer is not turned on, or your network cable is not plugged in

2. Ping DNS is used to test which operator's network you are using. It is just the network of Telecom, mobile, Unicom and great wall. The other is to check who is using BT download tool or large data transmission in the LAN you are using through Ping DNS

3. The function of Ping gateway command is very big. Generally, there should be a common network troubleshooting method used by people with 3-4 years of experience. People who just come out to work are new to many things, which may be vague and not clear enough. They just know that they need to do this, but they don't know why they need to do this. It's very understandable. The value and significance of this thing lies in your practical frequency and your own perception. If you use it frequently, you will definitely analyze it. If you want to use it like this, you will surely It's better to find out the answer by yourself, of course, what you find on the Internet is only for reference, and the mechanical description is not as deep as the feeling of skin cutting

Ping gateway is to solve the problem from the source. We need to know what the function of gateway is. Gateway is a door, a door to the outside, so the internal part of gateway is LAN, and the external part is Internet. If you Ping gateway is different, then there is a problem in the router, either shut down, or who unplugs the network cable interface, or the cable is gnawed by the mouse. If the above There are no problems. See if the fiber-optic equipment connecting your router has normal power supply and if the line has been broken. If it is broken, call the network operator to repair it. Sometimes the construction will break the fiber-optic equipment. Although there are not many such cases, there have been. What I met in that year, now I have a deeper understanding of why the gateway should be pinged

If the gateway can ping through, then Ping the management IP address of the core switch, then Ping the management IP address of the convergence layer switch, then Ping the gateway address of your network segment, the general idea is this. This is a top-down troubleshooting. For me, this method is applicable, that is to say, the straight point is to operate, and then form your own thing

How other servers can't access the Internet is the same. Check the gateway address of the server

Parameters of Ping connection

Ping 202.103.24.68 - t continuous Ping

Ping 202.103.24.68 - N 100 Ping package is equal to 100

By default, Ping ends with four packets. Ping also takes up traffic. If you have the best configured computer, turn on enough CMD and gather enough people to hang up Taobao. This is actually quite powerful. Don't underestimate the power of ants. If there are more ants, what can your elephant do? Just have fun

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