Proxmox 4.2 (Debian?) and IPv6 issues

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voodooFX

Active Member
Jan 26, 2014
247
52
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Hello,

I have some strange behaviours with IPv6 on my Proxmox server
First of all, my ISP is providing native IPv6 connectivity and usually I have no problems with it.

The story is a bit different with Proxmox / Debian
Essentially my Proxmox host has somehow got an IPv6 address but it is "unable" to use it

The vmbr0 has two IPv6 addresses, one auto assigned (fe80:..) and another one that looks like a valid address.
Despite this it has no connectivity, for example

Code:
root@pve01:~# ping6 www.google.com
PING www.google.com(wk-in-x93.1e100.net) 56 data bytes
< ------------ waiting forever
Code:
root@pve01:~# apt-get update
Ign http://download.proxmox.com jessie InRelease
Get:1 http://download.proxmox.com jessie Release.gpg [198 B]                                                                        
Get:2 http://download.proxmox.com jessie Release [2,167 B]                                                                          
Get:3 http://download.proxmox.com jessie/pve-no-subscription amd64 Packages [121 kB]                                 Ign http://download.proxmox.com jessie/pve-no-subscription Translation-en_US                                                 Ign http://download.proxmox.com jessie/pve-no-subscription Translation-en                                                            
100% [Connecting to ftp.ch.debian.org (2001:67c:10ec:3dd1::42)] [Connecting to security.debian.org (2001:a78:5:1:216:35ff:fe7f:6ceb)]                                                                                                               20.4 kB/s 0s^C
< ------------- waiting forever

That said, the behaviour of the virtual machines deployed on the host is different

- Ubuntu installations have no problems, they have IPv6 address and connectivity "out of the box"
- CenOS7 (1511) have no IPv6 address after they are fresh installed, but after a yum update and reboot it works well as ubuntu
- Debian 8 virtual machines are not getting any IPv6 address and there is no way to obtain one. Also updating packages is painful because for some reasons apt-get is contacting the servers on IPv6 address and is waiting forever for the answer.

I can not find anything in the debian documentation or googling around, the only important parameter seems to be the auto or dhcp parameter on the line

Code:
iface eth0 inet6 auto
in /etc/network/interfaces

Of course no one of them makes any difference.
Btw in Ubuntu is "auto" and it works perfectly


Did I miss something?
 

Patrick

Administrator
Staff member
Dec 21, 2010
12,513
5,804
113
I am at IoT World 2016 today but this looks like it should be working after a quick glance.
 

voodooFX

Active Member
Jan 26, 2014
247
52
28
Hello Patrick,
this is my feeling to, it must be something stupid to set in Debian... uhm