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Old 04-18-2012, 08:17 PM
Asif Iqbal
 
Default eth0:1 did not come up automatically

I have the following config for interfaces

# 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
#auto eth0 eth0:1 eth0:2 eth0:3 eth0:4
auto eth0 eth0:1 eth0:2
iface eth0 inet static
address 192.168.0.84
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 192.168.3.65 192.168.2.65
dns-search example.net
iface eth0:1 inet static
address 192.168.0.80
netmask 255.255.255.0
network 192.168.0.0
broadcast 192.168.0.255
iface eth0:2 inet static
address 192.168.0.249
netmask 255.255.255.0
network 192.168.0.0
broadcast 192.168.0.255

However eth0:1 did not come up by itself. I had to up it manually, but
it also output some odd error messages

# ifup eth0:1
Interface 'eth0:1' not existent.
run-parts: /etc/network/if-up.d/ifmetric exited with return code 1
ssh stop/waiting
ssh start/running, process 3182

Obviously it is not true about eth0:1. Now I have the eth0:1 interface up.

I am running Ubuntu 10.04.4 LTS 64bit

what gives?



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Asif Iqbal
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Old 04-20-2012, 09:43 AM
Robie Basak
 
Default eth0:1 did not come up automatically

Asif,

On Wed, Apr 18, 2012 at 04:17:18PM -0400, Asif Iqbal wrote:
> iface eth0:1 inet static

eth0:1 isn't an interface. As far as I'm aware, ifupdown doesn't support
aliases directly, so you can't just add a stanza for it in
/etc/network/interfaces. But I may need to be corrected on this.

I've always done something like:

auto eth0
iface eth0 inet static
address 192.168.0.84
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 192.168.3.65 192.168.2.65
dns-search example.net
up ip addr add 192.168.0.80/24 dev eth0 label eth0:1
up ip addr add 192.168.0.249/24 dev eth0 label eth0:2

(label eth0:{1,2} are only needed for backwards compatibility with
ifconfig)

But perhaps there's a better way?

Robie
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Old 04-20-2012, 11:25 AM
Arnaud Soyez
 
Default eth0:1 did not come up automatically

Not sure if this will help, but here's how I did it on my server (don't pay attention to the wrong addresses or masks...):

auto eth0
iface eth0 inet static
*** address 192.168.1.31
*** netmask 255.255.240.0

*** gateway 192.168.1.1
*** up route add -host 192.168.1.31 dev eth0
*** pre-up iptables-restore < /etc/iptables.rules

auto eth0:1
iface eth0:1 inet static
*** address 192.168.1.32
*** netmask 255.255.240.0

*** gateway 192.168.1.1
*** up route add -host 192.168.1.32 dev eth0:1

auto eth0:2
iface eth0:2 inet static
*** address 192.168.1.33
*** netmask 255.255.240.0
*** gateway 192.168.1.1
*** up route add -host 192.168.1.33 dev eth0:2



And somehow,* auto eth0:1 ... wouldn't work properly, so i just added the following to /etc/rc.local, to make sure they are brought up:
ifup eth0
ifup eth0:1
ifup eth0:2



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