I have taken over an existing 1751 router from a previous tech who is no longer available to explain why he did what he did. Following is the area of trouble.
interface FastEthernet0/0.12
encapsulation dot1Q 12
ip address XXX.XXX.XXX.XXX 255.255.255.248 secondary
ip address 192.168.12.1 255.255.255.224
ip access-group 112 in
!
How do I get rid of the secondary ip address listing?