> For the complete documentation index, see [llms.txt](https://platform9.com/kb/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://platform9.com/kb/pmk/solutions/error-communication-failure-during-host-onboarding-platform9-fr.md).

# Error "Communication Failure" During Host Onboarding

## Problem

Adding a host to the Platform9 Managed Kubernetes Control plane (Onboarding) with the PMK CLI ( *pf9ctl)* fails with the error: "WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! "

## Environment

* Platform9 Managed Kubernetes - All Versions
* PMK CLI - All Versions

## Cause

The pf9ctl command is run for onboarding one or more remote hosts and the remote host's SSH fingerprint may have changed due to either rebuilding or replacement of the host.

## Resolution

On the host that's running the pf9ctl command, find the entry for the remote host's IP address or domain name in the \~/.ssh/known\_hosts file. Comment or remove the line as shown below and run the *pf9ctl* command again.

{% tabs %}
{% tab title="None" %}

```none
#10.xx.xx.xx ssh-rsa AAAAB.........f2U3
```

{% endtab %}
{% endtabs %}


---

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