[lug] route add syntax

[charles at lunarmedia.net]

i have a linux box with the following interface config

eth0 my cable modem provider's address assigned through dhcp

eth0:1 10.6.21.233 255.255.255.0

i am trying to add a few static routes to the linux box that will hit a
router off of my eth interface for private networks i am using in a lab.

i am entering:

route add -net 10.0.0.0 netmask 255.0.0.0 gw 10.6.21.1
route add -net 172.16.0.0 netmask 255.240.0.0 gw 10.6.21.1
route add -net 192.168.0.0 netmask 255.255.0.0 gw 10.6.21.1

10.6.21.1 is the ethernet interface of a router plugged into my home lan.

when i enter the route add commands, i get returned to a command prompt as
though it was accepted, however, netstat -rn does not show these networks
in the linux boxes routing table.

do i have incorrect syntax?