Cisco 4500 missing radius-server host command

[roadracers]

Trying to work on implementing dot1x on our new 4500e switches and noticed that the command radius-server host is missing. I have done some searching, but have been unable to get a reason for why this command is missing. aaa-new-model is in the config and I have Tacacs running well. Anyone have an explanation?

Model: 4503e and 4507e

IOS: cat4500es8-universalk9.SPA.03.08.02.E.152-4.E2.bin

[marce1000]

  - You may need  the new syntax for specifying the radius servers as in :

radius server host1
address ipv4 x.x.x.x auth-port 1645 acct-port 1646
key 7 value-of-encrypted-key
!
radius server host2
address ipv4 x.x.x.x auth-port 1645 acct-port 1646
key 7 value-of-encryped-key

M.

[mrmcgowan]

try issuing the 

aaa new-model command from global config mode first. I had the same issue.

[ricardomercado]

It works!