Yes you need to define allowed traffic to the ace. The ace acts as an implicit deny. It will block everything until you allow it. The first policy/class match that you should define is the management traffic class.
access-list ALL line 8 extended permit ip any any
class-map type management match-any remote_access
2 match protocol xml-https any
4 match protocol icmp any
5 match protocol telnet any
6 match protocol ssh any
7 match protocol http any
8 match protocol https any
policy-map type management first-match remote_mgmt_allow_policy
class remote_access
permit
interface vlan 121
ip address
access-group input ALL
service-policy input remote_mgmt_allow_policy
no shutdown