Hi all,
I’m trying to setup a multi-homed server with dual stack networking.
I’ve setup static adressing for both NICs for ipv4 and ipv6 like this:
# The primary LAN network interface
allow-hotplug eth0
iface eth0 inet static
address 192.168.1.xx
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255
gateway 192.168.1.1
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 192.168.1.1
dns-search somedomain.tld
iface eth0 inet6 static
address 2001:xxxx:xxxx:3::20
netmask 64
gateway 2001:xxxx:xxxx:3::1
dns-nameservers 2001:xxxx:xxxx:3::1
dns-search somedomain.tld
# The secondary DMZ network interface
allow-hotplug eth1
iface eth1 inet static
address 192.168.0.xx
netmask 255.255.255.0
network 192.168.0.0
broadcast 192.168.0.255
gateway 192.168.0.1
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 192.168.0.1
dns-search somedomain.tld
iface eth1 inet6 static
address 2001:xxxx:xxxx:2::20
netmask 64
gateway 2001:xxxx:xxxx:2::1
dns-nameservers 2001:xxxx:xxxx:2::1
dns-search somedomain.tld
The NICs are configured fine, but only _one_ ipv6 gets assigned. After a reboot
either
eth0 or eth1 gets it’s ipv6 assigned, never both. I can add the missing ip
manually with
ip -6 addr add 2001:xxxx:xxxx:2::20/64 dev eth1
But I can’t get it to be assigned automatically. What am I doing wrong here?
I’ve been googling for multi homed servers, but can’t find anything on this
issue.
Also, I noticed that if I ping6 a host is subnet A from a NIC in subnet B, the
servers ip6 in subnet A is used as source ip, even if an ipv6 in subnet B is
available on that NIC. Does this mean that the return traffic is routed over
subnet A in stead of B? This is not desirable since I’d like the traffic
between both subnets to be fire-walled by the router.
Thanks
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