1. Verify network connectivity:
Check if the network is properly configured, and the vSphere hosts are properly connected to the network. Verify that the IP address and subnet mask are correct.
1. Ping test:
Ping the vSphere hosts, and check if they respond. If the ping test fails, check the network configurations.
1. VM connectivity:
Verify if the VMs are connected to the network, and if they have the correct network configurations. Check the virtual network adapter settings.
1. vSwitch configuration:
Check if the vSwitch configuration is correct, and the uplink connection is properly configured. If necessary, create a new vSwitch and add the VMs to it.
1. Network adapter driver:
Check if the correct network adapter drivers are installed, and they are updated to the latest version.
1. Firewall configurations:
Verify if the firewall configurations are not blocking the required traffic. If required, disable the firewall temporarily to test the network connectivity.
1. DNS resolution:
Verify if the DNS server is properly configured and can resolve the domain names. If not, configure the DNS server or assign a static IP address.
1. Network load balancing:
Check if the network load balancing configurations are correct, and all the hosts are properly configured for load balancing.
1. Network topology:
Verify the network topology diagrams, to troubleshoot the issues from a high-level perspective.
1. Packet capture:
Capture the network packets using tools like Wireshark, and analyze them to troubleshoot the network issues.
