when pxebooting with multiple ethers available for pxebooting, after
the initial probe finds a .ini file the probe to find and partition the disks
does not skip ethers.  this means that if we found the .ini file on ether0
and there is more than one available ethernet ctlr, then ether1 will be the 
first interface we try to boot from.  the simple fix is to only probe for the
first ether.