Re: Networking Q concerning /etc/network/interfaces

[Harry Putnam <reader@newsguy.com>]

Jesse Thompson <jesset@gmail.com> writes:

> the interfaces file is really only going to come into pay during
> bootup, or when using eg ifup/ifdown scripts.
>
> You indicated that you may have configured the interfaces by hand via
> ifconfig; if so those changes will not survive a reboot. How long
> since your last reboot?

I was actually only speaking of 192.168.1.54 on eth0... but probably
didn't make it clear.

[...]

> If the anomaly survives a reboot, I would next use the following
> command to see what if any software or scripts are configured to muss
> around with the interfaces:

Well, the odd address ending 54 disappeared from ifconfig -a output
but still `interfaces' says 

   auto lo
   iface lo inet loopback
   allow-hotplug eth0
   iface eth0 inert dhcp

And the actual network shows up on eth1 in ifconfig -a output:

ifconfig -a
   eth0      Link encap:Ethernet  HWaddr 00:40:f4:b5:29:41  
             UP 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
             [...]

> grep -r 'eth[01]' /etc

That turns up some files, but I don't recognize any that I know to be
other networking tool files. 
(I added the -l flag and screened out /etc/mail files 
<I have lots of junk in there>, and files ending in ~):

grep -rl 'eth[01]' /etc |grep -v 'etc/mail\|~$'

  /etc/dhcp/dhclient.conf
  /etc/samba/smb.conf.ucf-dist
  /etc/samba/smb.conf
  /etc/udev/rules.d/70-persistent-net.rules
  /etc/initramfs-tools/initramfs.conf
  /etc/avahi/avahi-daemon.conf
  /etc/network/interfaces.bak-1
  /etc/network/interfaces-autoconfigged-11.10.06_152210
  /etc/network/interfaces_hp-static_2
  /etc/network/interfaces.bak-0
  /etc/network/interfaces_hp-static
  /etc/network/run/ifstate
  /etc/network/interfaces

The lines in  /etc/udev/rules.d/70-persistent-net.rules:

(one liners wrapped for mail)

  SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}==
    "00:40:f4:b5:29:41", ATTR{dev_id}=="0x0", ATTR{type}=="1", 
       KERNEL=="eth*", NAME="eth0"

  SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}==
    "00:11:09:ee:6c:04", ATTR{dev_id}=="0x0", ATTR{type}=="1", 
       KERNEL=="eth*", NAME="eth1"