To troubleshooting a missing route
When in end – to –end connectivity is in problem and the device are not pinging to each other. When there is a change in the network connectivity, then administrator should find the way to resolve the problem. There are some commands that help a lot in troubleshooting-
‘Ping’ command
Ping is stood ‘Packet internet Gropher’.It is a command by which we can check whether the particular host is reachable or not in the network. This command is work by sending the ICMP echo request and listing echo request reply. We use ping command to check the connectivity of my system to another in the network and if we can’t a site and the other entire site are ping, so it’s not a problem of my network. It is problem of that particular site only. If we can’t ping any site or system then the problem is in our network connection. So troubleshooting is must in this case to resolve the problem.
We can use ping command on the MSDOS window and then type ping followed by the domain name or IP address of the computer, we want to ping. We can get a list of the available options for the windows ping command with “ping – ?”
‘Traceroute’ command
The trace route command finds the break in the path when packet moves from source to the destination. The traceroute command traces the network path of the routers when the packet sends from sender to receiver. On the window computer, we can run traceroute in a MSDOS or command window by typing ‘tracert’followed by domain name.
By using the ping and traceroute command, we get the router- trip time. This is the time request to send the echo packet and get the echo reply. This is the useful for a idea of the delay of the link.
‘Show ip route’ command
The show IP route command is used to display the routing table of the router. Initially the routing table is empty if there is no interfaces have been configured. It shows directly connected networks, static route, dynamic route, routing protocols etc.
‘Show ip int brief’ command
This command show the interfaces information briefly-like all the interfaces is configured properly with ip address and the status whether it is up or down.
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