On Linux systems the routing table maps destinations to the router and network interface that IP must use to reach that destination.
netstat is a useful tool for checking your network configuration and activity. It is in fact a collection of several tools lumped together.
A HowTo article to add or edit the Default Gateway or Default Router in Sun Solaris Operating System.
Troubleshooting potential Solaris network services and issues using standard everyday tools ping, snoop, netstat and nfsstat.
Identifying a ethernet MAC address in Solaris as a non-root user is not as difficult as people think. arp, netstat and prtpicl are your friends.