illumos gate

It seems ifconfig (SIOCSLIFNAME) does not like VNIC names like 'il01', 'vnic02'

root@il01:~# uname -a
SunOS il01 5.11 oi_148 i86pc i386 i86pc

root@il01:~# dladm show-link
LINK        CLASS     MTU    STATE    BRIDGE     OVER
il01        vnic      1500   up       --         ?
vnic0       vnic      1500   up       --         ?
il1         vnic      1500   up       --         ?

root@il01:~# ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
        inet 127.0.0.1 netmask ff000000 
lo0: flags=2002000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv6,VIRTUAL> mtu 8252 index 1
        inet6 ::1/128 

root@il01:~# ifconfig vnic0 plumb
root@il01:~# ifconfig il1 plumb
root@il01:~# ifconfig il01 plumb
ifconfig: cannot plumb il01: Invalid argument provided

truss says why:

ioctl(12, I_PUSH, "ip")                         = 0
ioctl(7, SIOCGLIFGROUPNAME, 0x08047050)         Err#6 ENXIO
ioctl(12, SIOCSLIFNAME, 0x080472E0)             Err#22 EINVAL

The same on Illumos based system revision 13256 debug build:

# uname -srv
SunOS 5.11 il_101214_01_r13256-d

# dladm show-link
LINK        CLASS     MTU    STATE    BRIDGE     OVER
nge0        phys      1500   up       --         --
rtls1       phys      1500   unknown  --         --
rtls2       phys      1500   unknown  --         --

# dladm create-vnic -l nge0 vnic02
# ifconfig vnic02 plumb
ifconfig: cannot plumb vnic02: Invalid argument provided

# dladm create-vnic -l nge0 vnic2
# ifconfig vnic2 plumb

# truss -t ioctl ifconfig vnic02 plumb
ioctl(6, SIOCGLIFFLAGS, 0x08047320)             Err#6 ENXIO
ioctl(11, I_PUSH, "ip")                         = 0
ioctl(7, SIOCGLIFGROUPNAME, 0x080469A0)         Err#6 ENXIO
ioctl(11, SIOCSLIFNAME, 0x08046C30)             Err#22 EINVAL
ifconfig: cannot plumb vnic02: Invalid argument provided