Introduction
VMware ESXi is a bare-metal hypervisor installed directly on a server. It provides the platform for running virtual machines and managing their compute, memory, storage, and networking resources.
Prerequisites
- Verify that the server hardware is compatible with VMware ESXi 8.
- Prepare the appropriate ESXi 8 ISO image and an installation disk or virtual media.
- Have console access or remote-management access such as iLO or iDRAC available.
- Prepare the Management Network information, including IP address, subnet mask, default gateway, DNS servers, host name, and VLAN ID if applicable.
01 — Boot from the ISO
Mount the ESXi 8 ISO through the server virtual-media interface, such as iLO or iDRAC, or create a bootable USB drive from the ISO. Restart the server and choose the mounted virtual media or USB device as the boot source.
02 — Install ESXi 8
After the installer loads, accept the EULA, select the destination disk, choose the required keyboard layout, and set a strong root password. Review the selections, start the installation, and wait for it to finish before restarting the host.
Installation disk
Confirm the selected destination disk before starting the installation. The installer writes ESXi to the selected disk.
03 — First Boot and DCUI Login
After the host restarts, wait for the ESXi Direct Console User Interface to appear. Press F2, enter the root credentials created during installation, and open the system customization menu.
04 — Configure the Management Network
In the DCUI, open Configure Management Network, then select IPv4 Configuration. Choose a static configuration and enter the Management IP address, subnet mask, and default gateway that belong to the management network.
Use a static Management IP so that the host address remains predictable for administration and monitoring.
05 — Configure DNS and Hostname
From Configure Management Network, open DNS Configuration. Enter the DNS server addresses and assign a host name that can be resolved correctly in the management environment.
06 — Configure the Management VLAN
If the Management Network uses a VLAN, select VLAN (Optional) in Configure Management Network and enter the correct VLAN ID. Ensure that the physical switch port connected to the host is configured to carry that VLAN.
07 — Test the Management Network
Use Test Management Network in the DCUI to test reachability to the default gateway and DNS servers. Resolve any network, VLAN, gateway, or DNS issue before continuing to the Host Client.
08 — Sign In to the ESXi Host Client
Open the following address in a browser, replace ESXI-IP with the Management IP configured for the host, and sign in with the root account.
https://ESXI-IP/Datastore
In the ESXi Host Client, review the available storage devices before creating or selecting a datastore. Use a datastore with enough capacity and the intended redundancy level for the virtual machines that will run on this host.
Initial Networking
Review the physical uplinks and the default virtual switch after the Management Network is reachable. Confirm that the intended physical NICs are connected and that port groups and VLAN assignments match the network design before creating virtual machines.
NTP
Configure a reliable NTP source for the ESXi host and verify that the time is synchronized. Accurate time is important for logs, certificates, authentication, and troubleshooting across the virtual infrastructure.
Security Best Practices
- Use a strong, unique root password and protect access to the remote-management interface.
- Restrict Management Network access to authorized administrators and trusted management systems.
- Keep ESXi updated according to the approved maintenance process.
- Review services and enable only the management services required by the environment.
Troubleshooting
The host cannot boot from the installation media
Confirm that the ISO or USB was mounted correctly and that the selected boot source has priority in the server boot settings.
The Management Network is unreachable
Verify the static IP settings, subnet mask, default gateway, physical uplink connection, and switch VLAN configuration.
DNS or hostname resolution fails
Confirm the configured DNS server addresses, network reachability, and the DNS record for the host name.
A Management VLAN is not working
Confirm that the VLAN ID in ESXi matches the network design and is allowed on the physical switch port connected to the host.
Frequently Asked Questions
Should the Management Network use a static IP address?
Yes. A static Management IP keeps the host address predictable for administration, monitoring, and integrations.
When should a VLAN ID be configured for management?
Configure it when the Management Network is assigned to a tagged VLAN and the connected switch port carries that VLAN.
Why should NTP be configured on ESXi?
It helps keep time accurate for logs, certificates, authentication, and troubleshooting.
Conclusion
After installing ESXi 8, configure a reachable and secure Management Network, verify DNS and VLAN settings, test connectivity, and sign in to the ESXi Host Client. The host is then ready for the next storage, networking, time synchronization, and virtual-machine configuration tasks.
