It is possible to disable outbound load spreading in link-based IPMP. If you mark an interface as standby, that interface will not be used until an active interface fails, regardless of whether link-based or probe-based failure detection is used. Link-based failure detection is always enabled by the in.mpathd daemon.
Use the ipadm command as follows:
# ipadm set-ifprop -m ip -p standby=on interface
For information about how inbound and outbound load spreading in link-based IPMP works, see Benefits of Using IPMP in Administering TCP/IP Networks, IPMP, and IP Tunnels in Oracle Solaris 11.2 .