DES-3526:admin#config filter dhcp_server ?
Command: config filter dhcp_server

Next possible completions:
ports               add                 delete

DES-3526:admin#config filter dhcp_server add ?
Command: config filter dhcp_server add

Next possible completions:
permit

DES-3526:admin#config filter dhcp_server add permit server_ip ?
Command: config filter dhcp_server add permit server_ip

Next possible completions:
<ipaddr>