OVH - IPv6 only

[rcd]

With the recent cost increases for IPv4 addresses, and increased adaptation of IPv6 I'm planning towards IPv6-only deployment in OVH.

https://pve.proxmox.com/wiki/OVH seems to suggest that clients need to have an IPv4 address before an IPv6 can be added. Is it not possible to add an IPv6 address only?

I assume the host would need to have an IPv6 address as well to be routed through?

Sorry if these are dumb questions but I know so little about IPv6 that I hardly know how to formulate my questions in a good way, hope it make sense anyway.

EDIT.

I tried creating a CT for a test.
I got 2607:5300:60:xxxx::/64 from OVH, so I use
2607:5300:60:xxxx::2 as IPv6 address and
2607:5300:60:xxFF:FF:FF:FF:FF as IPv6 gateway

When the server comes up, it seems to have added a private IP address fe80::54c4:74ff:fe60:9e87/64 by itself, not sure where that comes from:

2: eth0@if58: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 56:c4:74:60:9e:87 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet6 2607:5300:60:xxxx::2/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::54c4:74ff:fe60:9e87/64 scope link
       valid_lft forever preferred_lft forever

I can't ping anything though:

root@ipv6test2:~# ping -6 2607:5300:60:xxFF:FF:FF:FF:FF
PING 2607:5300:60:xxFF:FF:FF:FF:FF(2607:5300:60:xxff:ff:ff:ff:ff) 56 data bytes
^C
--- 2607:5300:60:xxFF:FF:FF:FF:FF ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2039ms

The host doesn't have assigned an IPv6 address, should it? What should it be, 2607:5300:60:xxxx::1/64 or just anything?

 

[Vengance]

I think OVH still requires a vMAC which you can only generate for a IPv4 address.

A routed setup with ndppd should work however