Add or delete static route on Mac OS X
Add route
sudo route -n add -net 192.168.1.0/24 192.168.1.1
Delete route
sudo route -n delete -net 192.168.1.0/24 192.168.1.1
View status
netstat -nr
sudo route -n add -net 192.168.1.0/24 192.168.1.1
sudo route -n delete -net 192.168.1.0/24 192.168.1.1
netstat -nr