networking hosed after upgrading to 10.04

[Tom H]

On Tue, May 31, 2011 at 11:58 AM, scar <scar at drigon.com> wrote:
> Tom H @ 05/31/2011 01:41 AM:


>> What's the output of "nm-tool"?


> $ nm-tool
>
> State: connected
>
> - - Device: eth0  [Auto eth0]
>  IPv4 Settings:
>    Address:         192.168.1.139

So "Auto eth0" is your active network device. If this isn't a box that
uses wifi (and therefore is more effortless with NM than without), I'd
remove NM because you're just adding an unnecessary extra layer with
it installed - unless you can delete the /e/n/i configuration and seet
up the bridge from within the NM giu or cli (I have no idea whether Nm
can handle bridging but I know that it's been a goal for a while).



>> What's your bridge setup/configuration?
>
> not sure what you want here, i just followed the guide at
> https://help.ubuntu.com/community/KVM/Networking#bridgednetworking to
> get everything set up

You've posted exactly what I was asking for. (Apologies for the vagueness.)


> my /etc/network/interfaces and ifconfig:
>
> $ cat /etc/network/interfaces
> auto eth0
> iface eth0 inet dhcp

eth0 should be set up as "manual" and not as "dhcp" and it shouldn't


> $ ifconfig
> eth0      Link encap:Ethernet  HWaddr 00:24:8c:66:d9:b5
>          inet addr:192.168.1.139  Bcast:192.168.1.255  Mask:255.255.254.0

eth0 shouldn't have an ip address (remedied by the above).