vCF (VMware Cloud Foundation)

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VLAN Design Translation for VMware: Physical Trunks, Port Groups, and Guest Tagging

ai, AI (Artificial Intelligence), Artificial Intelligence, EST, ESXi, networking, Operational Validation, Port Groups, vCF (VMware Cloud Foundation), vDS, VGT, VLAN, VMware Cloud Foundation, vSphere, VST, vSwitch

VLAN issues in VMware environments are rarely caused by one mysterious setting. More often, they come from a translation problem. The network team thinks in terms of access ports, trunks, allowed VLAN lists, native VLANs, port channels, and upstream gateways. The virtualization team thinks in terms of vSwitches, distributed port groups, VMkernel adapters, VM network […]

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DVS Upgrade Guardrails: What Can Break When Old Distributed Switches Move Forward

ai, AI (Artificial Intelligence), Artificial Intelligence, vCF (VMware Cloud Foundation)

A vSphere Distributed Switch upgrade can look deceptively simple in the vCenter UI. Select the switch, choose the target version, confirm the warning, and move on. That is not how it should be treated in a brownfield environment. The risk is not that a DVS upgrade is always dangerous. The risk is that old distributed

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VM Network Troubleshooting from Guest OS to Uplink: A Layer by Layer VMware Runbook

ai, AI (Artificial Intelligence), Artificial Intelligence, ESXi, NSX DFW, pktcap-uw, port group, runbook, troubleshooting, vCenter Server, vCF (VMware Cloud Foundation), vDS, VLAN, vmnic, VMware Cloud Foundation, vSphere

Virtual machine network problems rarely arrive with a clean label. The ticket usually says something like “the VM is unreachable,” “the application cannot connect,” “ping fails,” “internet access is down,” or “VMs on different hosts cannot talk.” The underlying cause might be inside the guest OS, on the VM’s virtual NIC, in the port group,

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Patching vCenter Through VAMI Without Turning It Into a Recovery Event

ai, AI (Artificial Intelligence), Artificial Intelligence, backup and restore, Broadcom KB, Lifecycle Management, patching, runbook, VAMI, vcenter, VCF, vCF (VMware Cloud Foundation), VCSA, vSphere

Patching vCenter should not feel dramatic. The workflow in the Appliance Management Interface is straightforward: log in to VAMI, check for updates, stage, install, validate. Broadcom KB 316584 documents that basic path for vCenter Server 7.x and 8.x, including two patching options: using a URL-based repository or mounting a patch ISO as a local CD-ROM

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Patching vCenter Through VAMI Without Turning It Into a Recovery Event

ai, AI (Artificial Intelligence), Artificial Intelligence, backup and restore, Broadcom KB, Lifecycle Management, patching, runbook, VAMI, vcenter, VCF, vCF (VMware Cloud Foundation), VCSA, vSphere

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“No Healthy Upstream” Is Often a Certificate Problem: A vCenter Triage Runbook for KB 316619

ai, AI (Artificial Intelligence), Artificial Intelligence, certificate management, Lookup Service, No Healthy Upstream, STS Certificate, vCenter Server, vCert, VCF, vCF (VMware Cloud Foundation), VCSA, vSphere

You open the vSphere Client and instead of the inventory, you get a blunt message: No Healthy Upstream Sometimes the symptom is more explicit. The login flow may fail with: HTTP Status 400 – Bad Request Signing certificate is not valid Other times the vCenter Server Appliance looks partially alive from the outside, but core

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