A core dump is the state of working memory in the event of host failure. By default, a core dump is saved to the local disk. You can use ESXi Dump Collector to keep core dumps on a network server for use during debugging. ESXi Dump Collector is especially useful for Auto Deploy, but is supported for any ESXi host. ESXi Dump Collector supports other customization, including sending core dumps to the local disk.

Install ESXi Dump Collector, a support tool that is included with the vCenter Server autorun.exe application and that is also included in the vCenter Server Appliance.

Install vCLI if you want to configure the host to use ESXi Dump Collector. In troubleshooting situations, you can use ESXCLI in the ESXi Shell instead.


Set up an ESXi system to use ESXi Dump Collector by running esxcli system coredump in the local ESXi shell or by using vCLI.

esxcli system coredump network set --interface-name vmk0 --server-ipv4 10xx.xx.xx.xx --server-port 6500

You must specify a VMkernel NIC and the IP address and optional port of the server to send the core dumps to. If you configure an ESXi system that is running inside a virtual machine that is using a vSphere standard switch, you must choose a VMkernel port that is in promiscuous mode. ESXi Dump Collector is not supported on vSphere distributed switches.


Enable ESXi Dump Collector.

esxcli system coredump network set --enable true


(Optional) Check that ESXi Dump Collector is configured correctly.

esxcli system coredump network get

The host on which you have set up ESXi Dump Collector is set up to send core dumps to the specified server by using the specified VMkernel NIC and optional port.

Write a rule that applies the host profile to all hosts that you want to provision with the settings that you specified in the reference host (see Assign a Host Profile to Hosts).

For hosts that are already provisioned with Auto Deploy, perform the test and repair compliance operations to provision them with the new host profile. See Test and Repair Rule Compliance.

Turn on unprovisioned hosts to provision them with the new host profile.