Add default gateway for VMKernel port group

[bairstowscott]

Hi

I use this script to create a VMkernel port group but the last part of the script updates gateway address for all VMKernel port groups. How do I modify the  script so it adds the gateway for 55-CHI-VMKernel port group only. Thanks.

$hostname6= 'host1'
$pg = New-VirtualPortGroup -Name  55-CHI-VMKernel -VirtualSwitch "vSwitch1" -VLanId 55

New-VMHostNetworkAdapter -VMHost $hostname6 -PortGroup $pg -VirtualSwitch "vSwitch1" -IP "10.33.1.77" -SubnetMask "255.255.255.0" -ManagementTrafficEnabled $true

#Add gateway IP address
$netMgr = Get-View (Get-VMHost $hostname6 | Get-View).ConfigManager.NetworkSystem
$iproute = New-Object VMware.Vim.HostIpRouteConfig
$iproute.defaultGateway = "10.33.1.3"
$netMgr.UpdateIpRouteConfig($iproute)

[LucD]

Are you sure you can have different default gateways for multiple vmkernel portgroups on the same ESXi host ?

Afaik, there is only 1 routing table for all the vmkernel portgroups on an ESXi host.

And that seems to be confirmed by what you can specify on the UpdateIpRouteConfig method, only 1 default gateway.

[bairstowscott]

Yes, you can have multiple gateways for multiple vmkernel portgroups on the same ESXi host

In our environment, we have three vmkernel port groups on the host. One for vmotion, two for management(on different vSwitches).

The script updates the gateway for all three port groups. Is there a way of updating default gateway for one of the vmkernel?

[LucD]

I see.

Shouldn't you be providing a value (vmkx) for the gatewayDevice property on the HostIpRouteConfig object in that case ?

[bairstowscott]

what's vmkx value? can you give an example?

[LucD]

The name of your VMKernel device (vmk0, vmk1....)

[bairstowscott]

yes, I can provide VMKernel names. Do you know if there is a way of adding default gateway for vmk0 and vmk1?

Thanks!

[LucD · Accepted solution]

Did you try it like this ?

$hostname6 = 'host1' 
$pg = New-VirtualPortGroup -Name 55 - CHI-VMKernel -VirtualSwitch "vSwitch1" -VLanId 55
New-VMHostNetworkAdapter -VMHost $hostname6 -PortGroup $pg -VirtualSwitch "vSwitch1" -IP "10.33.1.77" -SubnetMask "255.255.255.0" -ManagementTrafficEnabled $true

#Add gateway IP address
$netMgr = Get-View (Get-VMHost $hostname6 | Get-View).ConfigManager.NetworkSystem 
$iproute = New-Object VMware.Vim.HostIpRouteConfig
 $iproute.defaultGateway = "10.33.1.3"
$iproute.GatewayDevice = "vmk0"
$netMgr.UpdateIpRouteConfig($iproute)

[bigartg]

after this script the check mark is not enabled:
-Override default gateway for this adapter

[LucD]

For that you to use the UpdateVirtualNic  method.

$spec = New-Object VMware.Vim.HostVirtualNicSpec
$spec.IpRouteSpec = New-Object VMware.Vim.HostVirtualNicIpRouteSpec
$spec.IpRouteSpec.IpRouteConfig = New-Object VMware.Vim.HostIpRouteConfig
$spec.IpRouteSpec.IpRouteConfig.DefaultGateway = '10.33.1.3'
$spec.Ip = New-Object VMware.Vim.HostIpConfig
$spec.Ip.IpAddress = '10.33.1.77'
$spec.Ip.SubnetMask = '255.255.255.0'
$spec.Ip.Dhcp = $false

$netMgr.UpdateVirtualNic('vmk2', $spec)