This feature is new in the Solaris Express 9/03 release.
The new routeadm command enables system administrators to configure IP forwarding and routing on all interfaces of a system. Any settings that are established through routeadm override system defaults that are read from configuration files at boot time.
The routeadm command provides options for enabling or disabling the global packet-forwarding function on all IPv4 or IPv6 interfaces of a system. routeadm can also be used to set up a system as a router, by turning on routing daemons for all system interfaces. In an IPv6 environment, routeadm can also be used to enable or disable dynamic routing for a host.