topic Re: Wwpn parameter is not available for Data ONTAP 9.0 and up in Microsoft Virtualization Discussions

Wwpn parameter is not available for Data ONTAP 9.0 and up

StorageNob — Wed, 04 Jun 2025 12:11:23 GMT

Hello,

Pardon if I'm rehashing an old thread. Got a customer who has adopted the position that WWPNs can never be randomly generated and must be deterministic.

I am automating several tasks for them in powershell and have come accross a problem trying to change the WWPN of a LIF. I get a warning message about the parameter being unavaliable for ONTAP 9.0 and newer.

Does any know of another automated method to change WWPN? I'd like to tell them it will have to be random, but can't unless it's basically impossible.

Thanks

Re: Wwpn parameter is not available for Data ONTAP 9.0 and up

donny_lang — Mon, 14 Oct 2019 21:27:27 GMT

Hi, can you provide the following information:

1. ONTAP version
2. PS Toolkit version

3. Command you're running to change the LIF's WWPN

4. Error output generated by the command

That'll allow us to help out a lot more easily - thanks!

Re: Wwpn parameter is not available for Data ONTAP 9.0 and up

StorageNob — Tue, 15 Oct 2019 11:08:42 GMT

1. ONTAP version 9.5P6

2. PS toolkit 9.6

3. New-NcNetInterface -Vserver svm_test -Name lif_test -Role data -Dataprotocol fcp -Node labnode1 -Port 1a -Wwpn 20:01:00:a0:98:00:af:01 -AdministrativeStatus up

4. Warning Wwpn parameter is not available for Data ONTAP 9.0 and up.

Re: Wwpn parameter is not available for Data ONTAP 9.0 and up

donny_lang — Fri, 18 Oct 2019 13:43:05 GMT

Yeah, I get the same error in my lab. Not sure why they decided to remove that particular functionality from the PSTK. In any case, you could use the Invoke-NcSsh cmdlet to run the native ONTAP CLI commands needed to change the WWPN. Something like this:

New-NcNetInterface -Vserver svm_test -Name lif_test -Role data -Dataprotocols fcp -Node labnode1 -Port 1a -AdministrativeStatus down
Invoke-NcSsh -Command "set -priv advanced;y;vserver fcp portname set -vserver svm_test -lif lif_test -wwpn 20:01:00:a0:98:00:af:01"
Set-NcNetInterface -Vserver svm_test -Name lif_test -AdministrativeStatus up

Of course, I'd probably want to flesh this out with some variables and and error-checking to make this easier to duplicate for different SVMs/ports/LIFs/etc. but the basics are there. 🙂

ZAPI also has the "net-interface-modify-iter" API call which includes the "WWPN" attribute, so you could likely make a native API call to handle this as well (using the Invoke-NcSystemApi command) if you'd rather not use SSH.

Donny

Re: Wwpn parameter is not available for Data ONTAP 9.0 and up

StorageNob — Fri, 18 Oct 2019 14:47:07 GMT

Thanks for the reply, that's very helpful.

Just started testing. Putty is installed on the machine.

I'm getting an error:

Invoke-NcSsh : The system cannot find the file specified

Import-Module DataONTAP

Connect-NcController (ip addr)

Then your command with proper svm and wwpn entered.

Can I run that commandlet while authenticated to the Cluster Management SVM? It's having a problem with the command itself.

Re: Wwpn parameter is not available for Data ONTAP 9.0 and up

StorageNob — Fri, 18 Oct 2019 15:29:52 GMT

Ok,

This solution worked, I just needed to ensure plink.exe (which is typically in C:\Program files(x86)\Putty) was copied over to the C:\Windows.

Thank You

Re: Wwpn parameter is not available for Data ONTAP 9.0 and up

donny_lang — Fri, 18 Oct 2019 15:31:13 GMT

Glad you got it sorted, thanks for following back up with the solution!