I'm having problems with Linux VM's at a certain VPS hoster. Periodically the hosts lose their ipv6 address. They go to 'deprecated' and then disappear completely. On the client side I have checked the following:
# sysctl -a |grep tempaddr
net.ipv6.conf.all.use_tempaddr = 0
net.ipv6.conf.default.use_tempaddr = 0
net.ipv6.conf.lo.use_tempaddr = -1
net.ipv6.conf.eth0.use_tempaddr = 0
# cat /etc/sysctl.conf
net.ipv6.conf.eth0.autoconf = 1
net.ipv6.conf.all.autoconf = 1
net.ipv6.conf.all.accept_ra = 1
net.ipv6.conf.eth0.accept_ra = 1
# cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
allow-hotplug eth0
iface eth0 inet dhcp
# This is an autoconfigured IPv6 interface
iface eth0 inet6 auto
Ip6tables on the hosts has rules to allow icmp6 packets in and out. The hosts are Debian 7. Ifdown/ifup does not restore the IP, but a reboot does. Then the problem will reoccur hours or days later. The provider claims that the problem must be with my configuration, but I don't know what. All suggestions welcome.
UPDATE: provider is tilaa.com.
