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Re: Networking Q concerning /etc/network/interfaces



On Sat 11 Feb 2012 at 14:13:22 -0500, Harry Putnam wrote:

> Running wheezy - 3.0.0-1-686-pae
> 
> I'm getting confused by what I see in /etc/network/interfaces,
> compared to what I see with ifconfig -a. 
> 
> What I see in /etc/network/interfaces:
> 
>   auto lo
>   iface lo inet loopback
>   allow-hotplug eth0
>   iface eth0 inet dhcp

Not a mention of eth1 anywhere?

> Does not match what I see with ifconfig -a
> 
>     eth0  Link encap:Ethernet  HWaddr 00:40:f4:b5:29:41  
>           inet addr:192.168.1.54  Bcast:192.168.1.255  Mask:255.255.255.0
>           BROADCAST MULTICAST  MTU:1500  Metric:1
> 
> 
>  [...]
> 
>     eth1  Link encap:Ethernet  HWaddr 00:11:09:ee:6c:04  
>           inet addr:192.168.1.42  Bcast:192.168.1.255  Mask:255.255.255.0
>           inet6 addr: fe80::211:9ff:feee:6c04/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> 
> [...]

I can think of no way ifupdown is able to bring up an interface it has
no knowledge of. Other network configuring programs could be in on the
act though.

Are eth0 and eth1 network cards? Is wireless involved?


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