The 2 commands are not related.
IP classless is used by the router to determine whether or not to forward packets for a unknown subnet of a major network.
The reason you are not seeing it in the configuration is because it is now the default so it won't appear. To verfiy you can type at config mode
2800(config)# no ip classless
then in your config you should see the line "no ip classless". Just make sure you put ip classless back on ie.
2800(config)# ip classless
IP forward-protocol is used by the router to determine which ports and protocols to forward when it receives broadcasts. ND in this case refers to old SUN workstations so i'm fairly sure you don't need this.