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    (Windows) guest IPv6 address doesn't collapse zeroes -> Long IPv6 addresses

    Scheduled Pinned Locked Moved Xen Orchestra
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    • D Offline
      dinhngtu Vates 🪐 XCP-ng Team @jr-m4
      last edited by

      @jr-m4 Could you check if your VMs are using XenServer or XCP-ng tools?

      J 1 Reply Last reply Reply Quote 0
      • J Offline
        jr-m4 @dinhngtu
        last edited by

        @dinhngtu said:

        @jr-m4 Could you check if your VMs are using XenServer or XCP-ng tools?

        They are using the vates provided xcp-ng guest tools.
        80a1bf8d-0557-4058-a094-c4f1d3611bc8-image.jpeg

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        • J Offline
          jr-m4
          last edited by

          I have now tried updating to the latest version included in the xcp-ng guest-tools.iso. Followed by a reboot.

          At the moment, the zeroes are collapsed. But I won't count my chickens before they've hatched. So I will reply back if they expand out again (as seen before).

          Thanks!

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          • J Offline
            jr-m4
            last edited by jr-m4

            I believe I have a reproducible method to make it expand.
            The trick aparently is Live migrating the VM.

            After reboot

            Pre live migration:
            5f44f037-3b0a-4b26-927f-f4142399ea4d-image.jpeg

            Post live migration:
            52b4fcbf-d7bb-4810-b610-997dbf98530f-image.jpeg

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            • TeddyAstieT Offline
              TeddyAstie Vates 🪐 XCP-ng Team Xen Guru
              last edited by TeddyAstie

              Do you have multiple guests agents in the VM (e.g Citrix and XCP-ng ones) that may step on each other for this IP ?

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              • J Offline
                jr-m4 @TeddyAstie
                last edited by jr-m4

                @TeddyAstie

                I do not have Citrix ones. This VM was pretty much freshly installed to test Windows2025 on as pure Vates-maintained stack as possible.

                Update: Please note my post above. Tha this seems to be triggered by live-migrating the vm

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                • J Offline
                  jr-m4
                  last edited by

                  ping @poddingue for visibility as I believe I've found the trigger for IPv6 expanding... Live Migrations

                  poddingueP 1 Reply Last reply Reply Quote 0
                  • poddingueP Offline
                    poddingue Vates 🪐 @jr-m4
                    last edited by

                    Thanks for the ping and for narrowing it down; that live-migration repro is a really useful signal. 👍
                    I don't know enough about how the guest tools report IPs back through XAPI to say where the canonicalisation should happen, but it sounds like something @Team-Hypervisor-Kernel might want to look at since the trigger is on the agent side after migration. 🤷
                    If it turns out to be reproducible on another Windows guest version (2022, 2019), that might help narrow it further; no pressure though, you've already done the hard part. 🙏

                    J 1 Reply Last reply Reply Quote 1
                    • J Offline
                      jr-m4 @poddingue
                      last edited by

                      @poddingue

                      I have done some more testing.
                      Windows Server 2022 is also affected. 9.1.145-77

                      I also tried the latest WindowsPV drivers from Vates, on Windows Server 2025. 9.1.200-0. And the "problem" still persists.

                      It is a very low impact and low importance "problem". Since it is afaik purely costmetical.

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                      • olivierlambertO Offline
                        olivierlambert Vates 🪐 Co-Founder CEO
                        last edited by

                        Still, something to fix 🙂

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