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esxi-host-shows-disconnected-vmware

Symptom: The host and VMs in a vcenter server appears to be disconnected. Issue: The host and its corresponding vms could appear as disconnected due to issue with any of the following services. vpxa - a service which runs in the esxi host. This service communicates with vcenter server. hostd - core service which runs in the esxi host vpxd - a service which runs in the vcenter server which communicates with the vpxa Resolution: 1. Try to ping the ESXi host. This ensures that the host is reachable 2. Ensure you can login to the VMs remotely. This ensures that VMs in the host are working fine. 3. Try to login to the ESXi host using vsphere client. This ensures that the hostd services are running perfectly. If this step fails, restart the hostd service using putty. 4. If the above three steps worked fine for you, the issue would be with the vpxa or vpxd service. In that case, first try to restart the vpxa service in the host and if that didnot resol...
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ESXi : Lost uplink redundancy on virtual switch "vSwitch0". Physical NIC vmnic0 is down

We had an issue suddenly getting an alert : Lost uplink redundancy on virtual switch "vSwitch0". Physical NIC vmnic0 is down. Affected portgroups:"vMotion", "Management Network". So as a troubleshooting Select the ESXi host effected Click on Configuration, Select Networking, Click on vSwitch0 Properties,Click on Network adapters Select on vmnic0, Click on remove, Click on Close Again Select Networking, Click on vSwitch0 Properties,Click on Network adapters, Click on Add, Select the vmnic0, Click on Next, Click on Next, Click on Finish Now Click on Ports tab of vSwitch Properties, Select on vMotion, Click on Edit, Click on NIC Teaming, Select on vmnic1, Click on Moveup button  to Active Adapters, Select on vmnic0, Click on Move Down to Standby Adapters, Click on OK Now Click on Ports tab of vSwitch Properties, Select on Management Network, Click on Edit, Click on NIC Teaming, Select on vmnic1, Click on Moveup button  to Active Adapters, Select o...
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"Host IPMI system event log status" alarm in vCenter Server

To resolve this issue, ensure that the NTP settings are correct on the ESXi host, clear the IPMI System Event log file, and reset the sensors.   To clear the IPMI System Event log file and reset the sensors: Open vCenter Server using the vSphere Client. In the vCenter Server Inventory, select the ESXi/ESX host. Click the  Hardware Status  tab. Click  System Event log  under View. Click  Reset Event   Log . The red alert is removed from the System Event log. Click  Reset Sensors  to reset the host sensors. Starting with ESXi 5.1 U2, 5,5 P01 and later, you can use the  localcli  command line to clear the IPMI SEL logs. To clear the IPMI SEL logs in ESXi 5.1 and later: Connect to the ESXi host through SSH.  Run this command: localcli hardware ipmi sel clear If you find an incorrect date and if you are unable to reset the logs: In ESX - Restart the management agents and  sfcbd...
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