Debian 8 support (Proxmox VE 4.x)

[albertdb]

I'm having troubles to configure a Debian 8 dedibox with Proxmox VE 4.1.

Interface vmbr0 gets configured (correct IPv6), but every time I try to go out of the box, I receive a Network is unreachable error. I've checked and no routes are defined.

Any help would be appreciated.

[outime]

Have you checked this issue?

[albertdb]

Yes, and the only sysctl directives that I was still missing were:

net.ipv6.conf.default.forwarding = 1
net.ipv6.conf.default.proxy_ndp = 1

I'll tell you in a minute if it works.

[albertdb]

DHCPv6 leases work, but routes are not added automatically. I had to find the router IPv6 address running dhclient -cf /etc/dhcp/dhclient6.conf -6 -P -v vmbr0 and manually add route ip -6 route add default via ROUTERIPv6 dev vmbr0 in order to be able to reach Internet.

Something is broken, all this should be automatic.

[albertdb]

Solved. See #3

[outime]

Oh well, I didn't have a chance to find the problem so I really appreciate the effort - merging this now! :)

[albertdb]

Well, this is very strange, after half an hour, IPv6 address disappears. I'm going to reboot once again and check if it happens for third time, but I'm not expecting a miracle.

[polites75]

If you enabled the ProxMox firewall, try adding the "NeighborDiscovery" macro.

[outime]

@albertdb do you have any update?

[albertdb]

@outime Not really. I'll try when I have some time with Ubuntu 16.04. I'm dropping the idea of using Proxmox in favour of LXD.

I didn't enable any firewall, BTW.

[elgs]

@albertdb how did you find ROUTERIPv6?

[albertdb]

@elgs If you run dhclient -cf /etc/dhcp/dhclient6.conf -6 -P -v vmbr0 you will see it.

[elgs]

When I ran this command, I got something like this. Which is the gateway information? I deliberate changed some bits of the ID's.

Bound to *:546
Listening on Socket/vmbr0
Sending on Socket/vmbr0
PRC: Confirming active lease (INIT-REBOOT).
XMT: Forming Rebind, 0 ms elapsed.
XMT: X-- IA_PD cb:03:d7:31
XMT: | X-- Requested renew +3600
XMT: | X-- Requested rebind +5400
XMT: | | X-- IAPREFIX 2001:bc8:1234:100::/56
XMT: | | | X-- Preferred lifetime +7200
XMT: | | | X-- Max lifetime +7500
XMT: V IA_PD appended.
XMT: Rebind on vmbr0, interval 910ms.
XMT: Forming Rebind, 910 ms elapsed.
XMT: X-- IA_PD cb:03:dd:11
XMT: | X-- Requested renew +3600
XMT: | X-- Requested rebind +5400
XMT: | | X-- IAPREFIX 2001:bc8:1234:100::/56
XMT: | | | X-- Preferred lifetime +7200
XMT: | | | X-- Max lifetime +7500
XMT: V IA_PD appended.
XMT: Rebind on vmbr0, interval 1750ms.
XMT: Forming Rebind, 2660 ms elapsed.
XMT: X-- IA_PD cb:03:dd:11
XMT: | X-- Requested renew +3600
XMT: | X-- Requested rebind +5400
XMT: | | X-- IAPREFIX 2001:bc8:1234:100::/56
XMT: | | | X-- Preferred lifetime +7200
XMT: | | | X-- Max lifetime +7500
XMT: V IA_PD appended.
XMT: Rebind on vmbr0, interval 3530ms.
RCV: Reply message on vmbr0 from 2001:bc8:2::2:111:2.
RCV: X-- Preference 255.
RCV: X-- IA_PD cb:03:dd:11
RCV: | X-- starts 1469249612
RCV: | X-- t1 - renew +43200
RCV: | X-- t2 - rebind +172800
RCV: | X-- [Options]
RCV: | | X-- IAPREFIX 2001:bc8:1234:100::/56
RCV: | | | X-- Preferred lifetime 7200.
RCV: | | | X-- Max lifetime 43200.
RCV: X-- Server ID: 00:01:00:01:1b:ac:bc:2d:10:60:12:34:12:34
PRC: Bound to lease 00:01:00:01:1b:ac:bc:2d:10:60:12:34:12:34.

[albertdb]

RCV: Reply message on vmbr0 from: [THIS IP]