CS-4.20.1 Public Ipv6 addition

[tatay188]

problem

Public Interface does not allow me to add more IPv6 segments, We need it for a reserved specific DOMAIN
Also adding a /55 the systems states I have to add a /64 my understanding is "at least or a shorter prefix"

Error 431 : The IP range with tag: vlan://untagged has already been added with gateway 2NNN:FFFF:X:LALA::1. Please specify a different tag.

The problem is only with IPv6.

versions

ACS 4.20.1 Multiple Domains and Subdomains - Bring your own IP
KVM
CEPH with IPV6

The steps to reproduce the bug

1.go to Zone
2.Select Public Network
3.Click Add IP
4 Select IPv6
click OK and the error POps.
...

What to do about it?

I should be able to add as Many IPv6 or IPv4 segments I want

[shwstppr]

@tatay188 I was able to add /55

though adding another range untagged did give an error

[tatay188]

Hello, Try to add one more /55 or even /64 in addition to the /55 you already have. It will not allow it. Tata Y.

…

On Aug 29, 2025, at 2:04 AM, Abhishek Kumar ***@***.***> wrote: shwstppr left a comment (apache/cloudstack#11527) <#11527 (comment)> @tatay188 <https://github.com/tatay188> I was able to add /55 image.png (view on web) <https://github.com/user-attachments/assets/5d0f04dc-861e-4573-99eb-6ae5383619bb> though adding another range untagged did give an error — Reply to this email directly, view it on GitHub <#11527 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACNEALIYT3ALZALJRL7CGBT3P7UPLAVCNFSM6AAAAACFCNFZR2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTEMZVHAZDSOBXGI>. You are receiving this because you were mentioned.

[DaanHoogland]

fixed by #11556

[tatay188]

@DaanHoogland @dhslove @weizhouapache It's working.
Created a feature request To assign the IPV6 to an account or Domain as part of the BYOIP feature, as this already exists for IPv4 Request: (https://github.com/apache/cloudstack/issues/12313)