eth assignment problem

[Peter Hovorka]

Hi there,

I recently tried to use a ubuntu installation on user mode linux and I 
ran into a strange problem.

Normally, an assignment of 

./vmlinux eth0=tuntap,tap1

results in eth0 set up inside the UML instance according to the 
assignment of tap1. This setup works with several distributions like 
debian sarge, fedora core 5 etc.

Ubuntu changes the assignment to eth2 - which would be the next free eth 
number on the host server.

It looks like the uml client assigning eth numbers whilst knowing about 
the hosts eth interfaces and incrementing the eth number for a free 
one.

Can anyone point to the cause of this behaviour, it must be something in 
Ubuntu Dapper that causes this because it works with all other 
distributions I tried.

Remarks:
- The problem does not occur with kernels numbered 2.6.14 or lower
- The user mode linux team hasn't changed anything in this regard in the 
last few months

Kind regards,
Peter