[CoLoCo] odd network interface

[Jim Hutchinson]

Okay, here is something odd I just discovered. I was reconfiguring my
wireless security tonight and while setting up my wife's laptop I ran
ifconfig. In addition to eth0 (the wired interface) and eth1 (the wireless
interface) I found this entry:

eth0:avah Link encap:Ethernet  HWaddr 00:12:3F:FA:01:DB
          inet addr:169.254.7.202  Bcast:169.254.255.255  Mask:255.255.0.0
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          Interrupt:11

Now, the laptop connects to the network wirelessly so eth0 isn't doing
anything. What I'd like to know is what the heck eth0:avah is and how it has
an address. Even more interesting is that I can ping that address from the
laptop.

Has anyone seen anything like this before? Any ideas what it is? My first
paranoid reaction was that someone had set up an ad hoc connection but it's
on the wrong adapter (wired) and as far as I know it was never running any
service that would allow this anyway. Avahi came to mind because of the
similar name (eth0:avah) but I never set that up and my wife doesn't have
sudo rights.

Thanks.
Jim

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