IPv6 SLAAC and/or DHCPv6 for PVE internal interfaces

[pocok]

Hello,

My current host configuration consists of OVS Bridges and IntPorts. One of the IntPorts is the "main" one with a default gateway and static IPv4 address set up. The PVE host is behind a router. My ISP is dual-stack, it also provides a IPv6 /64 CIDR using DHCPv6, which my router happily advertises to my other hosts in the network, including to also to the VMs/LXCs on the Proxmox hosts itself (static v4 adresses and SLAAC for v6, all set from the PVE GUI).

The PVE host itself (OVS IntPort) does not have a global IPv6 adress (apart from the link-local one). As I don't want to mess about with statically assigning IPv6 adresses, it is possible/advisable to configure the PVE interfaces to automatically get a delegated IPv6 address as well?

I was thinking something like adding "iface eth22 inet6 auto" below the directives in /etc/network/interfaces:

auto eth22
iface eth22 inet static
address 172.21.100.1/24
gateway 172.21.100.254
ovs_type OVSIntPort
ovs_bridge vmbr0
ovs_options tag=100

iface eth22 inet6 auto

As I read the disclaimer in the comment of the interfaces file, it is not advised to modify this file directly, perhaps placing the custom config under ./interfaces.d/ (?). Will this configuration work? If the inet6 line contains "auto", and there should be additional parameters for ovs_options too added (as for the static config)?

Thank You,

 

[Dominic]

Have you already been able to solve this?

As I read the disclaimer in the comment of the interfaces file, it is not advised to modify this file directly,

If you know what you're doing it's not a problem. But copying the file as backup prior to modifying it would be a good idea.