Re: Getting network settings to stick
On Tuesday 10 June 2008 09:25:12 Kent West wrote:
> Ron Johnson wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > On 06/09/08 18:54, Walt L. Williams wrote:
> >> Ooops! sorry. There is only one file in my /etc/network directory. It's
> >> called interface and goes as follows:
> >>
> >> # 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
> >> allow-hotplug eth0
> >
> > You don't need this.
>
> Or more specifically, this line (allow-hotplug eth0) allows the first
> wired ethernet card (eth0) to be recognized as being plugged into an
> ethernet connection or not. As I understand it, this allows you to move
> your system from one wired Ethernet jack in one LAN (say in Building 4,
> Room 103) into another jack on another LAN (say in Building 27, Room
> 212), without manually restarting your network. It's really only useful
> for laptops. In my experience, it doesn't work very well, so I remove
> this line, and replace it with the line "auto eth0", which causes the
> interface to automatically connect only when the /etc/init.d/networking
> script is run with start or restart.
>
> What makes you think the settings don't stick? Are you getting no IP
> address, or a different IP address, or what? If you're getting no IP
> address, I suspect it's the "allow-hotplug eth0" line, as Ron suggests.
>
> >> iface eth0 inet static
> >> address 192.168.0.5
> >> 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 192.168.0.1
> >> dns-search williams_home_network.lan
>
> --
> Kent West
> Westing Peacefully - http://kentwest.blogspot.com
Do you have NetworkManager up and running in that laptop ? I've seen the
behavior you describe happening with NetworkManager obtaining IPs from a DHCP
server in the network ignoring the settings in /etc/network/interfaces when
allow-hotplug eth0 is used along with NetworkManager.
Mihira.
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