[lxc-users] Is there anything in LXC that would prevent DHCPv6 from working?

[Wolfgang Bumiller]

> On March 18, 2016 at 1:19 PM John Lewis <oflameo2 at gmail.com> wrote:
> 
> 
> I am use wide-dhcpv6-server and wide-dhcpv6-client in two diffrent LXCs
> with an iproute2 created bridge and lxc created tun/tap devices and I am
> using 3.16.0-4-amd64 #1 SMP and my kernel. I don't have any firewall
> that would block ipv6 request and responses that would occur on port 546
> and 547, but I don't see any packets out of the interface on the client
> that are the packets that I am looking for when I tcpdump it. It is
> probably an application issue, but I just want to double check.

There shouldn't be anything lxc-specific here as far as I know.
Are you saying you have no firewall at all which could block anything,
or just that you think it should allow everything? You might still
be blocking neighbor discovery packets (which come from a MAC-derived
link-local ip address, so you also need to make sure you don't block
these by address either.)

(Oh also, just in case you're using an alpine linux containers, busybox'
dhcpv6 client is still not finished / broken (uses wrong addresses), so
that won't work.)