Re: activating an unconfigured interface using /etc/network/interfaces...?

[Matthew Whitworth <matthew@okcomputer.org>]

Complained, but worked:

dumb:~# ifup eth1
SIOCSIFNETMASK: Cannot assign requested address
dumb:~# ifconfig
eth1      Link encap:Ethernet  HWaddr 00:03:47:08:A5:44
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:133345 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:76747137 (73.1 MiB)  TX bytes:0 (0.0 b)
          Interrupt:10 Base address:0x8000
...

Thanks tons!

Matthew

Keegan Quinn wrote:
> Hello Matthew,
>
> On Wed, Jul 23, 2003 at 10:34:32PM -0700, Matthew Whitworth wrote:
>
> > I have a dual-homed host spanning two networks and I would like to leave 
> > one of its interfaces unconfigured so that I can use libpcap 
> > applications on that network unobserved.  I can do this using the 
> > command string "ifconfig eth1 0.0.0.0 up", but I was wondering if there 
> > was a way to do this using the /etc/network/interfaces file and the 
> > ifup/ifdown commands.  If there is, I can't seem to get the syntax.
>
>
> I use the following syntax, to bring up a MiniPCI wireless network
> interface with no address, so it can be added to a bridge.  Different
> purpose but same idea, I think.
>
> auto wlan0
> iface wlan0 inet static
>         address 0.0.0.0
>         netmask 255.255.255.254
>
> Nothing actually gets added to the routing table, AFAICT, but it's
> necessary to specify a netmask to stop ifupdown from complaining.
>
> HTH,
>
>  - Keegan