class-map match-all a match input-interface FastEthernet0/0policy-map a class a  set ip precedence 5interface FastEthernet0/0 service-policy output a二层匹配来自相接的对端设备接口MAC地址流量class-map B match source-add mac 0c00.41fc.0000policy-map B class B  set ip dscp efint f0/0 service-policy input B

依赖四层或者高层信息来做marking

class-map match-any apple

match access-group name tcp

match access-group name udp

ip access-list extended tcp

permit tcp any host 44.1.1.1

policy-map apple

class apple

set ip precedence 4

int f0/0

service-policy input apple

show policy-map int

class-map match-all C1

match protocol icmp

class-map match-all C2

match ip recedence 1

policy-map P1

class C1

bandwidth 20000 分配带宽为20Mb/s

class C2

bandwidth 30000

int f0/0

service-policy output P1

show policy-map

show int f0/0

在默认情况下，可用带宽是总带宽的75%。

用百分比方式来配置CB-WFQ

policy-map P1

class C1

bandwidth percent 20

class C2

bandwidth percent 30

class C3

bandwidth remaining percent 20 （剩余方式）

int f0/0

service-policy output P1

对默认分类的修改从默认的FIFO队列改为WFQ队列。

policy-map P1

class class-default

fair-queue

修改CB-WFQ可以占用的带宽数值（默认为75%）：

int f0/0

max-reserved-bandwidth 100

采用MQC的方式配置基本的CB-LLQ

ip access-list extended telnet

permit tcp host 12.1.1.1 host 12.1.1.2 eq 23

class-map telnet

match access-group name telnet

policy-map telnet

priority 8 //代表8KB。

int f0/0

service-policy output telnet

采用带宽百分比的方式配置低延时队列

policy-map telnet

class telnet

priority percent 10

CB-WRED基于类的WRED

ip access-list extended udp

permit ip any any precedence 5

permit udp any any eq ntp

class-map match-any udp

match access-group name udp

policy-map WRED

class udp

bandwidth percent 10

random-detect

int f0/0

service-policy output WRED