How to set TCP window scaling on Solaris 11.1?

I was reading the excellent Note 1002174.1 but got in doubt how to set up the TCP window scaling on Solaris 11.1.
(it should be noted that only the 1st edition of the reference book seems to usefully describe the details)

A quick look at ipadm didn't reveal any clues:

$ ipadm show-prop tcp
PROTO PROPERTY              PERM CURRENT      PERSISTENT   DEFAULT      POSSIBLE
tcp   cong_default          rw   newreno      --           newreno      newreno,cubic,
                                                                        highspeed,vegas
tcp   cong_enabled          rw   newreno,cubic, newreno,cubic, newreno  newreno,cubic,
                                 highspeed,   highspeed,                highspeed,vegas
                                 vegas        vegas                    
tcp   ecn                   rw   passive      --           passive      never,passive,
                                                                        active
tcp   extra_priv_ports      rw   2049,4045    --           2049,4045    1-65535