upgrade to 10.4 and 2nd network interface does not auto start

NoOp glgxg at sbcglobal.net
Fri Jun 18 20:22:11 UTC 2010

On 06/18/2010 10:59 AM, stan wrote:
> On Fri, Jun 18, 2010 at 12:37:28PM -0500, Tom Browder wrote:
>> On Fri, Jun 18, 2010 at 07:10, stan <stanb at panix.com> wrote:
>> > I just upgraded a machine from 9.04 to 10.04 and now the 2nd network
>> > interface s not brought up, when I boot the machine. If I manually run
>> > /etc/init.d/networking restart, after the machine is up, ?it comes up.
>> > Both interfaces are hardwired.
>> I solved all my network problems by installing wicd and removing
>> network manager (in that order).
> Since this machine is a fixed installation, and simply has 2 dedicated
> hardwired networks, is there any danger in simply uninstalling network
> manager?

I have a test 10.04 machine with two nic's - both use a fixed IP address
(same one actually). I normally use wicd, but because it's a test
machine I am using NM. Both are configured as 'Manual' in NM. If I bring
up the machine with eth0 plugged into the network, that one is
connected. If I unplug and plug into eth1, that one is selected and
working. If I bring up the machine with eth1 plugged in, that one is
brought up & working, etc.

Now, as a test, I just changed the IP address on eth0 and plugged in
another cable; both interfaces are up and showing their proper IP's. VNC
into the machine...
$ ifconfig
eth0      Link encap:Ethernet  HWaddr [snipped]
          inet addr:  Bcast:

eth1      Link encap:Ethernet  HWaddr [snipped]
          inet addr:  Bcast:

$ cat /etc/network/interfaces
auto lo
iface lo inet loopback

auto eth1

auto eth0

As you can see there are not fixed IP entries in
/etc/network/interfaces. Connection information appears to be in
/etc/NetworkManger/system-connections (protected).

With that configuration (different fixed IP's & two network cables
plugged in) I rebooted to see if both nics come up simultaneously: they
do, both are up and running properly.

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