Add Serial port to VM through GUI or powerCLI

Goto ESXi host on vCenter ->Configuration -> Security Profile ->Firewall Properties.

The Goto VM where you want to enable the serial connection à

Right click -> Edit Settings -> Hardware -> Add -> Serial Port

 

Reference:

http://pubs.vmware.com/vsphere-50/index.jsp#com.vmware.vsphere.vm_admin.doc_50/GUID-95F75E85-1944-4FE7-A909-66E920682312.html

PowerCLI script to do create serial port. Although Firewall settings on esxi server has to be done manually.

# Adds the base cmdlets

Add-PSSnapin VMware.VimAutomation.Core

# This script adds some helper functions and sets the appearance. You can pick and choose parts of this file for a fully custom appearance.

. "C:\Program Files (x86)\VMware\Infrastructure\vSphere PowerCLI\Scripts\Initialize-PowerCLIEnvironment.ps1"

Function New-SerialPort

{

 Param(

   [string]$vmName,

   [string]$prt

) #end

$dev = New-Object VMware.Vim.VirtualDeviceConfigSpec

$dev.operation = "add"

$dev.device = New-Object VMware.Vim.VirtualSerialPort

$dev.device.key = -1

$dev.device.backing = New-Object VMware.Vim.VirtualSerialPortURIBackingInfo

$dev.device.backing.direction = "server"

$dev.device.backing.serviceURI = "telnet://:$prt"

$dev.device.connectable = New-Object VMware.Vim.VirtualDeviceConnectInfo

$dev.device.connectable.connected = $true

$dev.device.connectable.StartConnected = $true

$dev.device.yieldOnPoll = $true

$spec = New-Object VMware.Vim.VirtualMachineConfigSpec

$spec.DeviceChange += $dev

$vm = Get-VM -Name $vmName

$vm.ExtensionData.ReconfigVM($spec)

}

1. Power OFF your VM
2. open PowerCLI 
3. New-SerialPort <vmname> <telnet port number>
4. Power ON your vm
5. telnet <esxi IP> <port number>