Media for "no ip classless" and "ip cef"

"no ip classless" and "ip cef"

Hi All,

Does anyone have any idea if "no ip classless" still works in recent IOSes? I have observed on Cisco 2801 that even after turning "no ip classless" IOS still uses classless ruting behavior. The routing table looks like this:

Gateway of last resort is 0.0.0.0 to network 0.0.0.0

172.16.0.0/24 is subnetted, 3 subnets R 172.16.1.0 [120/1] via 172.16.2.2, 00:00:12, Serial0/1/0 C 172.16.2.0 is directly connected, Serial0/1/0 C 172.16.3.0 is directly connected, FastEthernet0/0 C 192.168.1.0/24 is directly connected, Serial0/1/1 S* 0.0.0.0/0 is directly connected, Serial0/1/1

No matter if "no ip classless" or "ip classless" is in use, the ping to the network 172.16.4.0 succeed (but with classfull behaviour shouldn't):

Router#ping 172.16.4.1

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.4.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 12/14/16 ms

I don't need classfull behaviour in production, I'm just wondering if command "no ip classless" have any meaning in current IOSes and if process switching can be enabled in other way than turning "ip cef" off.

Thanks for any clues, Pawel