===

access-list 101 permit udp any any eq bootps

class-map match-any DHCP
match access-group 101

policy-map pc_policy
class DHCP
priority 200

int fa0/0
service-policy output pc_policy

===

DNS (Port 53, UDP): Priorytet 100
DHCP (Porty 67 i 68, UDP): Priorytet 200
WWW (Port 80, TCP): Priorytet 50
HTTPS (Port 443, TCP): Priorytet 60
VoIP (Porty RTP 16384-32767, UDP): Priorytet 300
FTP (Porty 20, 21, TCP): Priorytet 40
TFTP (Port 69, UDP): Priorytet 80
Email (SMTP, IMAP, POP3, TCP): Priorytet 70

===