I'd like to set user provided lower 64 bits tacked onto the existing /64 prefix with libvirt but I cannot find a way to do this. Is it even possible ? If not, it would be great to add this functionality.
I tried "token" setting in libvirt network config such as :
<ip family='ipv6' token='::f33d:100'>
</ip>
but it's not recognized.
Thx for the help.
EM
I was wronggly assuming I had to set this in libvirt but I finally found what I was looking for. I created a bridge on the host and then managed to set my tokenized IPv6 identifier (for example ::f33d:100) in the guest network config.
So, now my router advertises the aaaa:bbbb:cccc:dddd prefix and my guest IPv6 address is automatically set to aaaa:bbbb:cccc:dddd::f33d:100. If ever I decide to use another of my ISP delegated prefix on this network, I just have to reconfigure my router with, for instance, the new aaaa:bbbb:cccc:eeee prefix and my guest IPv6 address will automagically switch to aaaa:bbbb:bbbb:eeee::f33d:100.