[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Networking Q concerning /etc/network/interfaces

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

Does not match what I see with ifconfig -a

    eth0  Link encap:Ethernet  HWaddr 00:40:f4:b5:29:41  
          inet addr:  Bcast:  Mask:
          BROADCAST MULTICAST  MTU:1500  Metric:1


    eth1  Link encap:Ethernet  HWaddr 00:11:09:ee:6c:04  
          inet addr:  Bcast:  Mask:
          inet6 addr: fe80::211:9ff:feee:6c04/64 Scope:Link


-------        ---------       ---=---       ---------      -------- 

What shows as eth1 in ifconfig is the working IP (...42) of this host.
Nothing is plugged into device seen as eth0 (...54).  That is,
although there is a second network adapter, nothing is plugged into
it, and all traffic comes and goes on [...]42.

It can be seen in the output of netstat -r

  Kernel IP routing table
 Destination Gateway     Genmask         Flags   MSS Window  irtt Iface
 default     fw.local.lan         UG        0 0          0 eth1 *     U         0 0          0 eth1

So it appears at a superficial reckoning that dhcp has assigned an
address to eth0, but that address appears to be attached to eth1 in
ifconfig and netstat output.

What explains this apparent anomaly?

Reply to: