Solaris e1000g mtu 9000

Hi, I have four solaris servers and I want to connect them with a NetApp NAS

The solaris version is:
5.10 Generic_127127-11 sun4v sparc SUNW,SPARC-Enterprise–T2000

I use the e1000g driver on Solaris

I cant find out how to set mtu to 9000

after searching on the internet i see there are only 3 options for mtu:

e1000g.conf:
MaxFrameSize=0,1,2,3,0,0,0,0,0,0,0,0,0,0,0,0;
        # 0 is for normal ethernet frames.
        # 1 is for upto 4k size frames.
        # 2 is for upto 8k size frames.
        # 3 is for upto 16k size frames.

However I do not want to set it to 16k size frames, because if the solaris is trying to write 16k packets on the netapp, and the netapp has 9000 mtu configured, I assume this is not going to work?

Any ideas how to set specifically 9000 mtu on my Solaris interfaces?

Thanks