Check the net Device Alias in OBP

To boot the client from the WAN with the boot net, the net device alias must be set to the client's primary network device. At the client ok prompt, type the devalias command to verify that the net alias is set to the primary network device /pci@1f,0/pci@1,1/network@c,1.

ok devalias
screen                   /pci@1f,0/pci@1,1/SUNW,m64B@2
net                      /pci@1f,0/pci@1,1/network@c,1
net2                     /pci@1f,0/pci@1,1/network@5,1
disk                     /pci@1f,0/pci@1/scsi@8/disk@0,0
cdrom                    /pci@1f,0/pci@1,1/ide@d/cdrom@0,0:f
keyboard                 /pci@1f,0/pci@1,1/ebus@1/su@14,3083f8
mouse                    /pci@1f,0/pci@1,1/ebus@1/su@14,3062f8

In the previous output example, the primary network device /pci@1f,0/pci@1,1/network@c,1 is assigned to the net alias. You do not need to reset the alias.