Troubleshooting In Virtualization, Providing Several Solutions To Communication Problems And Network Slowdowns

Troubleshooting in virtualization is one of the permanent actions of virtual network administrators. In this post, we are going to talk about troubleshooting in virtualization.

In this post, we want to offer some solutions in the field of network communication troubleshooting and performance slowdown.

Troubleshooting in network communication virtualization

In virtualized environments, to troubleshoot a network connection, we must perform the following steps to reach the desired destination.

Examining the signs of network communication

Some of the symptoms here are:

• You cannot connect to the Internet;
• There is no network connection to or from a virtual machine;
• Virtual machines have trouble connecting to the network;
• Cannot access an IP address;
• TCP / IP communications are down and can not be connected to or from a virtual machine;

Network communication errors

You may also get the following errors:

• Destination host is not available;
• Network errors;
• Communications rejected;
• The network cable is not connected or disconnected;
• Request pings can not find the desired hosts;
• Please check the name and try again;
• We can not solve the problem in the target system, and so on;

Fix network communication problem

The following solutions are provided for some of the above problems:

• Make sure the Port Group Name is available for virtual machine network adapters, whether on the switch or on the virtual distributed switch. Also check the spelling and make sure you spell it correctly.
• Make sure that the storage capacities in your virtual machine are sufficient, sometimes it affects the communications.
• Check the virtual network adapter and make sure it is connected.
• Make sure that the networking works properly within the host operating system in the virtual machine.
• Make sure the TCP / IP stack is working properly.
• If this virtual machine has been transformed from a physical system, make sure there are no hidden network adapters here. Because they can hide static paths.
• Make sure there are enough virtual switches for the virtual machine ports.
• Make sure the virtual machine is configured with two virtual network cards so that it can delete one network card or one physical configuration.
• Then Make sure the firewall does not restrict the virtual machine from accessing the Internet.
• Also Make sure the antivirus program does not restrict virtual machine access to the Internet.
• At last, Make sure the network adapter is enabled.
• Turn off the virtual machine and then restart the device on which the virtual machine is hosted.
• Remove and reinstall the Virtual Network Card Adapter once.

Troubleshooting in slow-paced virtualization

First, see if the CPU load is high. You can click on the CPU. Here you will be shown the CPU consumption of the virtual machine. If this value is too high, you should consider adding a virtual processor.

This is possible if your physical machine has a processor with more cores, and you can assign it to your virtual machine. You should also look at the software in the virtual machine that actually consumes the virtual processor.

Memory check

Memory is also one of the things that greatly reduces the working power of a virtual machine. If you do not have enough memory for the current configuration, RAM will often be transferred to the hard drive. If current applications consume more than two-thirds of your RAM, you should allocate more memory to the virtual machine.

Check the disk layout.

For pre-Windows 7 and Windows Server 2008 operating systems,. Or some older Linux operating systems may have the hard drives installed incorrectly. Improper arrangement will reduce their performance, especially when the IOPS‌ hard drives are low and cannot be properly distributed.

Here it is necessary to format the virtual disk well so that it can have the appropriate file size or format with the required software. For example, the Microsoft SQL Server 2005 database often uses the New Technology File System (NTFS), which has a block size of 64KB.

If the virtual machine has been having problems for some time, it is best to check the system antivirus checklist. Note that here you should not only look at the current virtual machine but also the functionality of other virtual machines.

If you have a P2V system – meaning you have turned a physical machine into a physical machine – here it is best to do a clean up and delete files and programs that you no longer use.

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