How to make eth1 being up upon reboot?

Dims · 05-25-2009, 10:41 AM

I have two interfaces eth0 and eth1 on linux machine. eth1 is set up to use DHCP but is not working upon reboot. I always need to issue a command

ifup eth1

after reboot.

How to make eth1 to be up automatically?

acid_kewpie · 05-25-2009, 10:43 AM

you've not said what distro you are using at all, but guessing fedora / centos / redhat or a similar derivative, you need to set "ONBOOT=YES" and BOOTPROTO=DHCP in /etc/sysconfig/network-scripts/ifcfg-eth1

Dims · 05-25-2009, 11:15 AM

Sorry, I am using debian/lenny.

jamescondron · 05-25-2009, 11:35 AM

You could cheat and put it in rc.local, but thats fixing the symptoms, not the problem

pentode · 05-25-2009, 11:51 AM

Take a look in /etc/network/interfaces (text file). If a stanza for eth1 is not there, you'll need to add it. Be sure to include the "auto" command. There should be some examples to help you. This should get run during boot, IIRC.

Dims · 06-06-2009, 12:05 PM

Now I have similiar situation with eth0 and Fedora 9 - eth0 in down after reboot and I need to up it manually. H

How to fix it?

I have the following config file (IP addresses removed by me):

Code:

[root@kestrel network-scripts]# cat ifcfg-eth0
# Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller
DEVICE=eth0
BOOTPROTO=static
HWADDR=00:1f:bc:00:fb:78
ONBOOT=yes
DHCP_HOSTNAME=host20.anla.org
NM_CONTROLLED=no
IPADDR=65.XXX.XXX.XXX 
NETMASK=255.255.255.248
GATEWAY=65.XXX.XXX.XXX
TYPE=Ethernet
USERCTL=no
PEERDNS=yes
IPV6INIT=no
DNS2=198.6.1.1
DNS1=198.6.1.2

Dims · 06-06-2009, 12:20 PM

My suspection is follows: I have patched dhcp for infiniband use and it prevents normal eth0 startup (despite the fact it is configured for static IP I see dhcp-related messages about eht0 in boot logs).

Dims · 06-08-2009, 08:51 AM

I have installed new clean installation of Fedora 9 today. On old i386 machine. Initially eth0 was configured for using DHCP and was automatically up when system starts. But after I reconfigured /etc/sysconfig/network-scripts/ifcfg-eth0 to the following

Code:

DEVICE=eth0
BOOTPROTO=static
HWADDR=00:02:b3:03:11:da
ONBOOT=yes
DHCP_HOSTNAME=testbed2
IPADDR=192.168.10.7
NETMASK=255.255.255.0
DNS1=192.168.10.1
NM_CONTROLLED=no
TYPE=Ethernet

it stops. I.e. I need to do "ifup eth0" after each reboot.

What's wrong with the text above?

Dims · 06-08-2009, 12:06 PM

Problem resolved!

The following command helped:

chkconfig --levels 35 network on

I.e. other place, controlling eth0 upping exists!