Basic troubleshooting methods and principles for IP network failures

it's obvious .,ExcludeIPnetwork failure in addressing is a very important skill,because there's always a lot of trouble in the Internet.,This kind of thing can happen to you too. Because this kind of thing is not pleasant,so,whether you're at work or at home.,If you canIPdiagnose these problems on the network and fix it,then it will bring great convenience to you and your colleagues. Let's say you're with a client .,He's complaining that his host cannot connect to a server that is located on a remote network. Here are ourHengyang High-protectionIDCRoomtechnician to summarize someIPTroubleshooting , there is a need for high-anti-server rental, server hosting friends contact15013023312.

Four steps in the wrong row:
Let's take a closer look at our network first.
1. Open the DOS window and ping127.0.0.1 This is a diagnostic or loopback address If you get a successful Ping return , you can assume that your IP the stack is initialized. If it fails , then you need to reinstall TCP/IPon this host.
C:) Pi ng 127.0.0.1
Ping 127,0.0.1 w1th bytes of data:
REP1Y from 127 . 0.0,1:bytes=32 t1me (1ms ttl=
28
rep1y from 127.0.0.1:bytes=32 time<1ms ttl=128
REP1Y from 127. 0.0,1:bytes=32 time<1ms ttl=128
Reply from 127.0.0,1:bytes=32 time<1ms ttl=128
P1ng stat1stics for 127.0,0,1:
Packets:sent = 4, Received =4, Lost = 0 (0% loss),
2. under DOs Windows , ping the IP address of the local host ( Network IP). If successful , then you can describe your network interface
Card(NIC)is functionally normal. If it fails,it indicates thatNICThere is a problem with the card. This step does not indicate that the network cable is connected toNICon,It can only be explained on the hostIPThe address stack can(throughLANDrive)with thisNICfor communication.
c:>ping 202.102.188.11
Ping 202.102.188.11 with bytes of data:
rep1y from 202.102.188.11:bytes=32 time<1 Ms ttl=128
rep1y from 202.102.188.11:bytes=32 time<1ms ttl=128
Reply from 202.102.188.11:bytes=32 time<1ms ttl=128
rep1y from 202.102.188.11:bytes=32 time<1ms ttl=128
P1ng stat1st1cs for 202.102.188.11:
Lost = 0 (0% 1oss), packets:sent = 4, rece1ved = 4,
Approximate round tr1p times 1n M1111-seconds
M1n1mum = OMS, Max1mum =oms, AVerage = OMS
3. under DOS windows , ping the default gateway ( router ). If ping is ok , the NIC is connected to the network
and can communicate with the local network. If it fails , It indicates a local physical network problem ,
This problem may occur in Any one location between the NIC and the router.
c:>ping 202.102.188.1
Ping 202.102.188.1With bytes of data:
rep1y from 202.102.188.1:bytes=2 t1me<1ms ttl=128
rep1y from 202.102.188.1:bytes=32 t1me<1ms ttl=128
rep1y from202.102.188.1:bytes=32 time<1ms ttl=128
rep1y from 202.102.188.1:bytes=32 t1me<1ms ttl=128
P1ng Stat1st1cs for 202.102.188.1:
Packets:sent = 4, rece1ved = 4, Lost = 0 (0% 1oss),
4. If steps 1 through 3 are successful , try pinging the remote server. If normal , It means that you
IP Communication can be made between the local host and the remote server . Also, you can be sure that the remote physical network
the network is also normal.
C:) Ping 172.16.20.2
Ping 172.16.20.2 with bytes of data:
rep1y from 172.16.20.2:bytes=32 time<1ms ttl=128
rep1y from 172.16.20,2:bytes=32 t1me<1ms ttl=128
rep1y from 172.16.20.2:bytes=32 t1me<1ms ttl=128
rep1y from i72.16,20,2:bytes=32 time<1ms ttl=128
Ping stat1st1cs for 172.16.20.2:
packets:sent=4, rece1ved = 4, Lost = 0 (0% 1oss),
if all is well after step 1 through step 4 , and this user is still unable to communicate with the server , then you may
faced with the problem of some name resolution,This requires checking your domain name server(DNS)settings or problems with your server itself. But,ifPingRemote server failed,so you're going to be dealing with some remote physical network problems .,At this,you need to get to the server.,and perform the steps1to the3the steps of the test,Until the crux of the problem is found.

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Basic troubleshooting methods and principles for IP network failures