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[ubuntu] making eth0 to primary nic

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http://ubuntuforums.org – hi there, ave installed ubuntu 12 server, with 2 NIC cards, choose eth0 to be primary during installation, for squid3 proxy. Nw internet only works with eth1 not eth0 which is the primary. due to this i cant configure the iptables and lan. running sudo nano /etc/network/interfaces shows #the primary network interface auto eth0 inet static address 81.25.128.x netmask 255.255.255.x gateway 81.25.128.x #dns -xoptions are implemented by the resolvconf package, dns-nameservers 91.x.x.x 91.x.x.x iface eth1 inet static address 81.25.128.x (Hardware)

dayu's picture
Submitted by dayu on 12/03/2012

Stories similar to [ubuntu] making eth0 to primary nic

Hi All,

I have 2 NICs in my U9.04 Server box (eth0, eth1). After I added 2 virtual interfaces for each physical interface (eth0:1,eth0:2,eth1:1,eth1:2), the MAC addresses of all the interfaces have changed to that of eth0. Because eth1 was configured to be on my local network, I can't access the box remotely anymore.

I have 3 network cards installed in my ubuntu 10.04 server and I want to configure Internet sharing and file sharing on eth1 for wired users and wlan0 for wireless users.

Static ip: eth0: 192.168.1.1 eth1: 10.0.0.15 wlan0: 10.0.0.20

/etc/network/interfaces

# The loopback network interface auto lo iface lo inet loopback

# The primary network interface auto eth0 iface eth0 inet static address 19

[ubuntu] Help with eth1 2 years 46 weeks ago

Hi,

I'm running LTSP with 2 network cards.

Eth0 is used to boot into the thin client. This is working fine - no problems with this.

Now I'm trying to configure eth1 which is to connect to the Internet through my router. However, there is no connection.

This is the output from etc/network/interfaces:

my question is as simple as the title, i have a debian 6 , 2 NICs, 3 different subnets in a single interface, just like this:

auto eth0 iface eth0 inet static address 192.168.106.254 netmask 255.255.255.0

auto eth0:0 iface eth0:0 inet static address 172.19.221.81 netmask 255.255.255.248

auto eth0:1 iface eth0:1 inet static address 192.168.254.1 netmask 255.255.255.248

I can't ifdown an interface on a Debian 6.0.5 box;

user@box:/etc/network$ sudo ifdown eth0 && sudo ifup eth0 ifdown: interface eth0 not configured SIOCADDRT: File exists Failed to bring up eth0.

user@box:/etc/network$ cat interfaces auto lo iface lo inet loopback

allow-hotplug eth0 allow-hotplug eth1

auto eth0 iface eth0 inet static address 10.0.0.1 netmask 255.255.255.0 gateway 10.

I have debian hosts which are connected through trunk port on 5 different vlans. But this host respond to arp "who-has" requests of all of their differents ip.

Hi there,

I am new ubuntu user. I have tried to configure wireless usb adapter on my 9.10 desktop. Adapter did worked fine, but I have problems with wired connection now:

I can ping my router. Skype works fine (don`t need DNS), internet on virtual machine (winXP) works too.

THis is CAT of interfaces:

I have to NICS, eth0 is static, eth1 uses DHCP.

I have these configured through /etc/network/interfaces:

Code: auto lo eth0 eth1 iface lo inet loopback address 127.0.0.1 netmask 255.0.0.0

iface eth0 inet static         address 192.168.58.1         netmask 255.255.255.0         broadcast 192.168.58.255         n

Hey all,

I'm having a really odd issue.

I just upgraded my 11.11 server to 12.04, by performing a clean install.

I edited my /etc/network/interfaces file to the following:

Code: # This file describes the network interfaces available on your system # and how to activate them.