Is there a way to get back my public IP-address?

Question

Is there a way to get back my public IP-address?

Ole Henrik Oftedal 1

When I created my VM I selected Dynamic IP and not Static IP on the VM.

We (a Microsoft Support Engineer and I) tried to make it Static. But we didn't succeed 100% and he said that the system would anyway ask me if address was in the process of being released.

After many tries, we finally got the Static radio button selected, but we didn't get rid of this information message:

This public IP address can't be updated because it is associated to the IP configuration 'ipconfig1', in the network interface 'nnnnnnXXXX'.
IP address assignment
Static

Today I have a new IP address:-( Will it be possible to get back the one I had last week?

Answer 1

Ronen Ariely 14,131 MVP

Today I have a new IP address:-( Will it be possible to get back the one I had last week?

Probably Not. I am pretty sure that no one will manually configure the DHCP for you

but you can make your current IP static to make sure it will not be changed next time

Simply use the portal -> navigate to the VM -> Click on the IP address

and select static IP

Ole Henrik Oftedal 1 Reputation point

2022-01-23T14:17:23.147+00:00

If we do as you describe we just get message already mentioned:
This public IP address can't be updated because it is associated to the IP configuration 'ipconfig1', in the network interface 'nnnnnXXX'.
Looks like we have Static selected but it is kind of greyed out like it it is disabled.
We have tried to unattached / reattach (deallocate/allocate) network interface in different combination. Apparently we did not succeed.
Ronen Ariely 14,131 Reputation points MVP

2022-01-24T22:20:22.777+00:00

No problem :-)

In this case, these steps might solve your issue

(1) Click on the Public IP address

(2) Move to the "overview"

(3) Copy to notepad the value of the "Associated to" so you will remember it for next steps

(4) Click the Dissociate at the top and then Yes to confirm - you will lost current the IP address but should fix it for next IP

(5) Under Configuration while the IP is not Associate, change the "IP address assignment" to static and add a DNS name label and then Save

Back to "Overview" and click on "Associate" -> fine the Network Interface with the name you copied to notepad in step 3

Answer 2

Hi @Ole Henrik Oftedal ,

Thank you for reaching out to Microsoft QnA.

I see @Ronen Ariely has already answered your query, and yes unfortunately it is not possible to get back the previous ip. I would like to add in to @Ronen Ariely 's answer.
If you want to change your Public IP address assignment from dynamic to static, first note down the public ip name and then disassociate the public IP from the IP configurations of the network interface (NIC).

After disassociating, search for the public ip name under the Public IP address service. Select the public IP that you just disassociated from the NIC, and now you will no longer see the IP address assignment as greyed out, you can then change it to Static.

In short, you cannot change the IP address assignment method (Static or Dynamic) for a Public IP while the IP is still associated or attached to a NIC. It needs to be first disassociated, only then can the assignment type change, post which you will have to re-associate the IP to the NIC via IP configurations.

I hope this answers your question.

Please refer to the snippets below.

Please 'Accept as answer' if the provided information is helpful to help others in the community.

Answer 3

Ole Henrik Oftedal 1

Thanks to both of you:-) I did as described and had no problems doing Disassociate and Associate. When I go into VM and on Overview I click on my Public IP address I still get this warning:

"This public IP address can't be updated because it is associated to the IP configuration 'ipconfig1', in the network interface 'xxxxNNNN'."

But then I guess this is just an information message? On other VMs (they have today mostly dynamic assignments) there are no info/warning message when I click the same place.

IP address assignment is
Static
(and greyed out)

srbhatta-MSFT 8,441 Reputation points Microsoft Employee

2022-01-25T14:28:39.15+00:00

Hi @Ole Henrik Oftedal , just curious if you are hitting the Save button after clicking on Disassociate option? Also, a quick FYI - If your Public IP is of basic sku then it supports both Static and Dynamic assignment, if it is of Standard sku then it supports only Static assignment. Please let me know if this helps.
Ole Henrik Oftedal 1 Reputation point

2022-01-26T10:28:54.133+00:00

Hi:-) I followed Pituaches guide very carefully. I can also follow yours if that can help. But I am now very happy with my IP address and my contacts are informed about my new ip. I can try your description but then I must be 100%sure that the system will not find the opportunity to get me another ip than the one I have today. That would be very embarrassing for me in my customer contact. It is a Basic SKU involved here.
Ole Henrik Oftedal 1 Reputation point

2022-01-26T13:03:12.437+00:00

Ok I took the chance. I followed your guide and remembered to save. The message about public IP address cannot be updated is still there. Maybe its just an info message? Luckily, no change in IP address and DNS name after following your procedure:-).
Ronen Ariely 14,131 Reputation points MVP

2022-01-27T11:25:27.417+00:00

I can try your description but then I must be 100%sure that the system will not find the opportunity to get me another ip than the one I have today. That would be very embarrassing for me in my customer contact.

If you can stop and deallocate the VM for 20 minutes, then you can check if you get a new IP. Usually DHCP do not store the IP for more than 20 min and I assume that in the Azure it is shorter. You cannot count on this but this can help to check

Is there a way to get back my public IP-address?

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