Checking vmkernel interfaces using get-vmhostnetworkadapter in specific portgroup name


If you have labeled vmkernel portgroups using names such as vmotion, nfs that would describe the purpose we can quickly search ip of those cards.

Get-VMHostNetworkAdapter -VMKernel -VMHost (get-cluster "myCluster1"|get-vmhost)  | ? {$_.PortgroupName -eq "nfs"} | select Name,VMhost,Mac,IP
Name         VMHost              Mac                        IP
----         ------              ---                        --
vmk1         host1               00:50:56:77:77:77          192.168.0.10
vmk1         host2               00:50:56:77:77:78          192.168.0.20

Nice, we now have mac,ip vmkernel interface name and information in which host in the cluster this vmk resides.
Now, if you want to get additional information besides those, you can try to check which are available by yourself.
So the object we are investigating here is a vmhostnetworkadapter.
Let’s take 1 vmhostnetworkadapter first:

Get-VMHost MyHost1 | Get-VMHostNetworkAdapter -VMKernel | ? {$_.PortgroupName -eq "nfs"}  | gm

You can see the | gm at the end. This will help us investigate what other properties are available to us.
First we will notice that the object type is:

TypeName: VMware.VimAutomation.ViCore.Impl.V1.Host.Networking.Nic.HostVMKernelVirtualNicImpl

And we will receive whole list of properties and methods that are available

Name                         MemberType
----                         ----------
ConvertToVersion             Method
Equals                       Method
GetHashCode                  Method
GetType                      Method
IsConvertableTo              Method
ToString                     Method
AutomaticIPv6                Property
DeviceName                   Property
DhcpEnabled                  Property
ExtensionData                Property
FaultToleranceLoggingEnabled Property
Id                           Property
IP                           Property
IPv6                         Property
IPv6Enabled                  Property
IPv6ThroughDhcp              Property
Mac                          Property
ManagementTrafficEnabled     Property
Mtu                          Property
Name                         Property
PortGroupName                Property
SubnetMask                   Property
Uid                          Property
VMHost                       Property
VMHostId                     Property
VMHostUid                    Property
VMotionEnabled               Property

If we want to check only properties of this object we could specify this in get-mamber so:

Get-VMHost MyHost1 | Get-VMHostNetworkAdapter -VMKernel | ? {$_.PortgroupName -eq "nfs"}  | get-member -MemberType Property

For those who got lost a little with gm … get-member
gm does exactly the same as get-member. If you will type
alias gm
you will receive information that in fact this is just an alias for get-member

CommandType     Name       Definition
-----------     ----       ----------
Alias           gm         Get-Member

Alright, back to the main topic.
So what else can we get from the VMHostNetworkAdapter. By now we should see what kind of properties are there. You can add them to the select-object command

Get-VMHostNetworkAdapter -VMKernel -VMHost (get-cluster "myCluster1"|get-vmhost)  | ? {$_.PortgroupName -eq "nfs"} | select Name,VMhost,Mac,IP ->here

So if you wanted to see for example SubnetMask or Mtu you would just simply add it at the end to select-object like this

Get-VMHostNetworkAdapter -VMKernel -VMHost (get-cluster "myCluster1"|get-vmhost)  | ? {$_.PortgroupName -eq "nfs"} | select Name,VMhost,Mac,IP,Mtu,SubnetMask

Let’s say we want to see EVERYTHING that is available for us right away:

Get-VMHostNetworkAdapter -VMKernel -VMHost (get-cluster "myCluster1"|get-vmhost)  | ? {$_.PortgroupName -eq "nfs"} | select *
Get-VMHostNetworkAdapter -VMKernel -VMHost (get-cluster "myCluster1"|get-vmhost)  | ? {$_.PortgroupName -eq "nfs"} | format-list *
Get-VMHostNetworkAdapter -VMKernel -VMHost (get-cluster "myCluster1"|get-vmhost)  | ? {$_.PortgroupName -eq "nfs"} | format-table *

As you can see you can query all those properties in different ways.
One more thing, ‘select’ is an alias for Select-Object.
Format-list will generate output in a list as the name suggests 😉
Format-Table will generate a table (you have possibility to configure the table style here)
Select-Object will try to generate a ‘table look’, but it will not be the same table as format-table does. What is worth mentioning here is that for example object that will come from Format-Table or Format-List will not be understood by export-csv. Format-table output looks pretty much the same as if you had used the select-object, but it has different type. In this case only output from select-object could be piped without error to export-csv.
Whenever you are wondering if you can have more information about some object simply use get-member on it. If this will be a VM object, a VMHostNetworkAdapter object or a host object, you always can use get-member to see if there are useful properties for you to check.

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