Debian up in /etc/network/interfaces not working

debianifconfigipv6linux-networking

I'm trying to add a secondary IPv6 address to eth0 on Debian Sid.

I added the following lines to /etc/network/interfaces:

iface eth0 inet6 static
  address [IPv6 address #1]
  netmask 64
  gateway [IPv6 gateway]
  pre-up echo 0 > /proc/sys/net/ipv6/conf/eth0/autoconf
  up /sbin/ifconfig eth0 inet6 add [IPv6 address #2]/64

After a reboot there is only one IPv6 address assigned to eth0. However, if I simply execute the command (/sbin/ifconfig eth0 inet6 add [IPv6 address #2]/64) manually, I have 2 IPv6 addresses assigned to eth0, just like I want.

It looks like the up command is just not executed at all. Has this been changed? I do have a /etc/network/if-up.d directory, but I read that those scripts may be run more than once.

How can I make up work or add a second IPv6 address on Debian Sid?

Best Answer

Not a direct answer to why up doesn't work, but maybe a solution for your problem:

I usually use the same configuration style for multiple IPv4 and IPv6 addresses for consistency. This is the configuration of one of my servers:

auto eth0
iface eth0 inet static
    address 94.142.242.211
    netmask 28
    gateway 94.142.242.209

iface eth0 inet6 static
    address 2a02:898:148::211
    netmask 64
    gateway 2a02:898:148::1

auto eth0:0
iface eth0:0 inet static
    address 94.142.242.212
    netmask 28

iface eth0:0 inet6 static
    address 2a02:898:148::212
    netmask 64

auto eth0:1
iface eth0:1 inet static
    address 94.142.242.217
    netmask 28

iface eth0:1 inet6 static
    address 2a02:898:148::217
    netmask 64

The IPv6 addresses show up on eth0 not on eth0:0 and eth0:1 when seen through ifconfig:

eth0      Link encap:Ethernet  HWaddr 00:50:56:80:96:82  
          inet addr:94.142.242.211  Bcast:94.142.242.223  Mask:255.255.255.240
          inet6 addr: 2a02:898:148::217/64 Scope:Global
          inet6 addr: 2a02:898:148::212/64 Scope:Global
          inet6 addr: 2a02:898:148::211/64 Scope:Global
          inet6 addr: fe80::250:56ff:fe80:9682/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:0    Link encap:Ethernet  HWaddr 00:50:56:80:96:82  
          inet addr:94.142.242.212  Bcast:94.142.242.223  Mask:255.255.255.240
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:1    Link encap:Ethernet  HWaddr 00:50:56:80:96:82  
          inet addr:94.142.242.217  Bcast:94.142.242.223  Mask:255.255.255.240
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

I don't know why your configuration doesn't work, but maybe doing it this way will work for you...

Related Solutions

Debian – Bringing up network interface without IP configured in Debian, for XEN dom0

Oh dear... I think you're trying to use the Xen bridging stuff, which is just dire. Set network-script network-dummy in xend-config.sxp, then go with this config:

iface lo
iface lo inet loopback

# Local network, cable labeled M3
auto eth0
allow-hotplug eth0
iface eth0 inet static
    address 192.168.1.184
    netmask 255.255.255.0
    gateway 192.168.1.1

# cable labeled M1
iface eth1 inet manual
    hwaddress ether 00:19:5B:33:86:D5

# cable labeled M2
iface eth2 inet manual
    hwaddress ether 00:19:5B:33:86:D3

auto br-eth1
iface br-eth1 inet manual
  bridge_ports eth1

auto br-eth2
iface br-eth2 inet manual
  bridge_ports eth2

What you then do is tell the domUs to use either the br-eth1 or br-eth2 bridge (as appropriate). Given that you've got cable labelling happening, I'd change the bridge names to something more useful, like perhaps m1 and m2.

Debian – How to update the /etc/network/interfaces file so the box comes up with ONLY IPv6 self-assigned address

I don't have experience with your particular bonding device, but I tried out the following test in a VM on Debian Lenny with a single NIC (eth0). In /etc/network/interfaces:

auto eth0
iface eth0 inet manual
    up /sbin/ifconfig eth0 0.0.0.0

After bringing up eth0, here's what I get from /sbin/ifconfig eth0:

eth0       Link encap:Ethernet  HWaddr 08:00:27:15:8e:d7
           inet6 addr: fe80::a00:27ff:fe15:8ed7/64 Scope:Link
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           ...

So I have an IPv6 Link-local address (derived from the MAC address), and no IPv4 address. I am able to ping6 another machine on my local network by its Link-local address, and vice versa, so the interface appears to work.

So, to sum up: Try setting the iface line for your bond0 interface to:

iface bond0 inet manual

and add this line to the end of its configuration stanza:

up /sbin/ifconfig bond0 0.0.0.0

I have no idea whether this is "the right way" to do it, but it works for my simplified case.

Best Answer

Related Solutions

Debian – Bringing up network interface without IP configured in Debian, for XEN dom0

Debian – How to update the /etc/network/interfaces file so the box comes up with ONLY IPv6 self-assigned address

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