[lxc-users] LXD Bridged IPv6

[Nick Falcone]

Hello

I have been banging my head up against a wall for a few days now trying
to get IPv6 to work across my bridged interface for my containers.

I have tried different VPS and dedicated servers as well as versions of
Ubuntu 14.04, 15.10, and 16.04 to get this working.  The latest test all
this info is from an Ubuntu 16.04 with the included version of LXD. 

First I install and run lxd init, I configure the bridge like so.

lxdbr0    Link encap:Ethernet  HWaddr fe:82:af:f0:5d:ce  
          inet addr:10.195.87.1  Bcast:0.0.0.0  Mask:255.255.255.0
          inet6 addr: 2604:a880:0:1010::623:2/64 Scope:Global
          inet6 addr: fe80::40c6:84ff:fe18:22fb/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:294 errors:0 dropped:0 overruns:0 frame:0
          TX packets:18 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:21612 (21.6 KB)  TX bytes:2127 (2.1 KB)

This is my host information too

eth0      Link encap:Ethernet  HWaddr 04:01:d4:50:c4:01  
          inet addr:162.243.200.170  Bcast:162.243.200.255 
          Mask:255.255.255.0
          inet6 addr: fe80::601:d4ff:fe50:c401/64 Scope:Link
          inet6 addr: 2604:a880:0:1010::623:1/64 Scope:Global
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:76258 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8187 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:111074998 (111.0 MB)  TX bytes:1230729 (1.2 MB)

I launch and enter the first container it has this info:

eth0      Link encap:Ethernet  HWaddr 00:16:3e:87:ff:20  
          inet addr:10.195.87.69  Bcast:10.195.87.255 
          Mask:255.255.255.0
          inet6 addr: 2604:a880:0:1010:216:3eff:fe87:ff20/64
          Scope:Global
          inet6 addr: fe80::216:3eff:fe87:ff20/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:20 errors:0 dropped:0 overruns:0 frame:0
          TX packets:294 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:2175 (2.1 KB)  TX bytes:25728 (25.7 KB)

so here I can see slaac is successful, but I cannot ping6
2604:a880:0:1010::623:1 (the host ipv6), I cannot ping google's public
dns ipv6 either.  I CAN successfully ping6 2604:a880:0:1010::623:2 my
bridge public IPv6.

Seems like a routing issue, so on the host I add:
ip -6 route add 2604:a880:0:1010:216:3eff:fe87:ff20 dev lxdbr0


Still not able to ping6 out.  As a side note IPv4 works great.

Am I missing something here? I cannot seem to find a lot of docs on this
small part.  I thought to look at the demo containers on
https://linuxcontainers.org/lxd/try-it/ but am unable to ping6 out on
those, is this just a limitation?

Thanks for any help in advance, would really like to use lxd for a
project.  Also I do not care to redact these real IPs, they belong to a
box only used for getting this working then will be destroyed.