PyNet Labs- Network Automation Specialists
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The Best 5 Network Troubleshooting Tools

Last Updated : June 28, 2022
Network Troubleshooting Tools

Hey there, in this blog, we will learn about the Networking Troubleshooting Tools. We might not be the networking doctor, but we can definitely have a first aid kit ready with us. Let's get started and understand the components of this Network Engineer's First Aid Kit. 

Network Troubleshooting Tools

Here are the top network troubleshooting tools which can be used in any scenario to troubleshoot the issues:

1. Ping

The tool, ping of ICMP (Internet Control Message Protocol) is a basic network troubleshooting tool used to check connectivity or reachability with a device or a network. It stands for Packet Internet Groper and is widely used to troubleshoot. Ping provides various features like: 

  • Host/Server Reachability 
  • Internet Connection 
  • Issues with Network Interface Card 
  • To test DNS Issues 

When you initiate a ping from the source to any destination, Echo Requests are sent from the source to the destination, to which the destination device sends Echo Reply as a response. In a scenario with no reply from the destination, we can understand that the reachability is not there. For example, receiving messages like Request timed out or Destination host unreachable means the destination device is not connected.  

There can be some scenarios where you might receive partial replies, for example, receiving a reply on 3 out of 4 packets sent. This could be because of packet loss due to Network Congestion, Network Flapping, Bad Cable, or Faulty Hardware.  

You can also use ping to check whether your network interface card is working correctly or not, called the loopback test. You can perform this by pinging localhost or the address 127.0.0.1; if you get all the replies, you can be assured that your Network Card is working properly, but if you don't get the replies, there could be some issues with your network card. 

Network Troubleshooting Tools

2. Traceroute

This tool tells you the path a data packet takes to travel across the network and reach the destination. PCs and servers are connected over the Internet using thousands of routers. The traceroute utility allows you to find the exact path that packet takes over these thousands of devices to reach your destination from the source. 

Using the Traceroute tool, you can find out the problems in the networks and perform troubleshooting at the required positions. Traceroute utility is a bit different than the ping because it sends 4 data packets to the destination when you ping from a PC. Once they reach the destination, it will return your data packets to your computer, confirming connectivity. 

However, traceroute gives us more information as it pings the final destination and all the routers that will be within that trip that the data packets took from each router and the destination.  

Let's try to traceroute the google.com. Go to my PC, open the command prompt, and type their tracert space the IP address or hostname of destination. In this case, we will use google.com and hit enter; after that, let's observe the outcomes. 

Network Troubleshooting Tools

The first column tells us the number of hops or steps; the route taken to the destination, which was a total of 12 hops. The next three columns tell us the time each data packet took to each point and back to your computer. The last column tells us about the IP address of each router and the final destination, and it also tells us about the domain name, if available. 

3. Ipconfig

ipconfig is a utility that can be used on a windows computer to display your IP address, the subnet mask, and the default gateway. It can be used for troubleshooting in many scenarios. Let's go ahead and type IP config in the command prompt and hit enter to see the outcome of our devices. 

Network Troubleshooting Tools

So here is the basic network configuration of our computer, the IP address configured on this computer is 192.168.2.106, the subnet mask is 255.255.255.0, and the gateway this PC is using is 192.168.2.1. We also have an IPv6 address as we are under the migration from IPv4 to IPv6. To avoid any compatibility issues while accessing websites in servers during this migration, our PCs are configured with both IPv4 and IPv6 addresses.  

Now, we are going to get more details out of the IP config command by typing ipconfig/all into the command prompt. It will display the full TCP/IP configurations of your network adaptors. It shows the additional information like hostname, MAC Address, details related to DHCP, and IP address of your computer's DNS server. 

4. NETSTAT

This tool displays the current network connections and port activity of your computer. Let's quickly run the netstat command on our command prompt to see the outcomes. 

Network Troubleshooting Tools
Network Troubleshooting Tools

When we run this netstat command, we get to see what all connections are established from our local PC using, what protocol at what particular address, and the state of those connections. 

In these details, we can see that TCP is the protocol being used and our computer's IP address, along with the port numbers used for that particular connection. And we can also see the IP address of the websites to which our computer is connected along with the protocol for websites, i.e., https. 

5. NSLOOKUP

This is a DNS troubleshooting tool called NSLOOKUP. We can troubleshoot issues related to DNS using this great tool. We use this tool to query DNS or, in other words, to look up the DNS records. Let's run the nslookup command followed by google.com on our command prompt and observe the outcome. 

Network Troubleshooting Tools

Here we can see the DNS records for google; we can see the IPv4 and IPv6 of google here in this outcome. Similarly, you can query the DNS for any other domain name. For example, amazon.com. 

Network Troubleshooting Tools

These were our top network troubleshooting tools; now, after learning these tools, you'll be able to troubleshoot most of your network-related issues. Have fun exploring the networks!  

If you like the information, you can subscribe to our free newsletter to never miss any future updates. You can learn more about the network troubleshooting tools in our CCNA and CCNP ENCOR training. For any other training, check out pynetlabs.com.

Frequently Asked Questions about Network Troubleshooting tools: 

Question – What are network troubleshooting tools? 

Answer – Network troubleshooting tools are tools used by network engineers/administrators to find the root cause of any network issue and help solve these issues. 

Question – What is the basic network troubleshooting? 

Answer – The basic network troubleshooting includes: 

  1. Check the hardware to check if everything is connected properly.  
  1. Finding the problem: Use various tools to identify the problem. 
  1. Once you have found the problem, find the best way to solve it. 
  1. Use the troubleshooting tools to test your theory. 
  1. Implement the theory to your network. 
  1. Test your network functionality again. 
  1. Note the issue as it may appear again in the future. 

Question - What are Network Tools? 

Answer - Networks tools are any software or application that helps build, maintain, secure, or distribute a network. These tools can also assist you in determining the problems with your networks and help you resolve these problems. 

Question – What are the types of troubleshooting? 

Answer - Types of troubleshooting

  • Top-up method 
  • Bottom-down method 
  • Man-in-the-middle method 
  • Divide-and-conquer method 
  • Follow-the-path method 
  • Spot-the-differences method 
  • Move-the-problem method 

These are the main methods of troubleshooting. 

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