[VLAN] creating vlans on diskless system

[Zoilo Gomez]

I am trying to use vconfig to create a VLAN on a diskless (NFS-rooted) 
system, after it has booted from a server via PXE.

The boot is via eth0, and I want to add the VLAN to eth0 as well.

As soon as I run "vconfig add eth0 101" (for example) the eth0 network 
link goes down. This is rather problematic because at that point NFS is 
no longer working of course, so nothing is working and I cannot debug 
the situation .....

Believing that it might have something to do with dynamic libraries 
being accessed while the eth0 interface is being reconfigured by 
vconfig, I created a statically linked version of vconfig, copied that 
to a RAM-disk on the diskless machine, but I get the same problem: as 
soon as I run vconfig eth0 goes down and my cursor hangs due to no more 
NFS support.

What could be wrong, and how can I debug this?

Z.