How to bond network interfaces

All, I have a quad NIC on a V880 running Solaris 9. I've heard you can bond interfaces together and get better throughput. I found this link that seems to describe the process well. However, the command mentioned (dladm) is missing. Is there some package I need to install to get this command? Thx.

Solaris: Bonding networkinterfaces - Blog - Notes from a Messy Desk

dladm is on Solaris 10 not 9. I do not know if there is some kind of "retro" dladm available for 9.

you can use the sun trunking software to build trunks/bonds on solaris 9. it's not part of the solaris 9 media and need to be downloaded.

Sun Downloads