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Re:VirtualBox KVM Public Release by iam-TJ on Thursday February 08, 2024 @12:46PM (#39305034)
Regarding IPv6, there is support. In fact I run IPv6 only networks including for the hypervisors.

    $ virsh net-dumpxml default6
    <network>
      <name>default6</name>
      <uuid>73590ea2-eb15-4e67-b104-319721bdf302</uuid>
      <forward mode='route'/>
      <bridge name='virbr1' stp='on' delay='0'/>
      <mac address='52:54:00:ff:a7:2d'/>
      <domain name='default6'/>
      <ip family='ipv6' address='2001:db8:ffff::1' prefix='48'>
      </ip>
    </network>
One can also use DHCPv6 if required.
Re:VirtualBox KVM Public Release by remram on Thursday February 08, 2024 @02:02PM (#39306055)
In virt-manager?
Re:VirtualBox KVM Public Release by deusum on Thursday February 08, 2024 @02:08PM (#39306130)
Virt-Manager does allow you to edit the xml config file by hand from within the interface. So, yes you can use ipv6; but no, it's not a convenient point and click gui interaction.

I'd be curious to hear the specific reasoning behind it.

Re:VirtualBox KVM Public Release by sph on Friday February 09, 2024 @04:41AM (#39313156)
That's what I meant, I had to use virsh to set that up because it's not possible to do in the GUI.
Re:VirtualBox KVM Public Release by iam-TJ on Friday February 09, 2024 @04:40PM (#39320852)
But it is!

virt-manager v4.0.0 (Ubuntu 22.04 amd64)

"QEMU/KVM" > "Details" (via double-click or context menu) > "Virtual Networks" tab > "+" (Add) button > "Create Virtual Network"/"Details" tab > Expand "IPv6 configuration" > check "Enable IPv6" > enter "Network" prefix and/or check "Enable DHCPv6" > enter "Start" and "End" addresses