ifconfig e1000g0 down unplumb 
ifconfig e1000g1 down unplumb 

Network connections will drop 

dladm create-aggr -d e1000g0 -d e1000g1 N 

N is an arbitrary number between 1 and 99 
The new interface will be "aggrN" (e.g. aggr1) 

dladm show-aggr 

key: 1 (0x0001) policy: L4      address: 0:3:ba:d9:1a:a (auto) 
           device       address                 speed           duplex  link    state 
           e1000g0      0:3:ba:d9:1a:a    1000  Mbps    full    up      attached 
           e1000g1      0:3:ba:d9:1a:b    1000  Mbps    full    up      attached

ifconfig aggr1 plumb up `cat /etc/hostname.e1000g0`; 
ifconfig aggr1 

Output should look like that from any normal active interface 

dladm modify-aggr -l active -T long N

dladm show-aggr -L 

key: 1 (0x0001) policy: L4      address: 0:3:ba:d9:1a:a (auto) 
                LACP mode: active       LACP timer: long 
    device    activity timeout aggregatable sync  coll dist defaulted expired
    e1000g0   active   short   yes          yes   yes  yes  no        no 
    e1000g1   active   short   yes          yes   yes  yes  no        no 

dladm show-aggr -s

key:1           ipackets   rbytes       opackets   obytes       %ipkts  %opkts 
        Total   7400008    4328912580   12053606   13413813380 
        e1000g0 4545797    2775001194   4030434    3082368604     61.4    33.4 
        e1000g1 2854211    1553911386   8023172    10331444776    38.6    66.6 
(You should see a distribution of packet traffic between the bonded interfaces) 

mv /etc/hostname.e1000g0 /etc/hostname.aggr1; 
reboot 

That's it.