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One port can be at the same time configured into QoS trust port and provided with ACL filtration.
ACL filtration can be configured firstly and then with QoS trust port, and so does QoS trust port
first and then ACL filtration.
4. Configure QoS Class
QoS class includes：COS class, PREC class, DSCP class, and ACL class
Before selecting one class a QoS should be created, in global CONFIG mode input following
command to create a QoS and enter into CLASS configuration mode. class-id is from 1 to 1000.
qos class <class-id> under CLASS mode you can add a name for QoS for identifying purpose:
name <class-name> for example create a QoS, class-id is 3, the name is abc: Switch# qos class
3 Switch(class-3)# name abc Switch(class-3)# show qos class 3, under CLASS configuration
mode select one kind of class flow for QoS.
● Following command chooses COS class flow for QoS to form COS class, at most only 8
COS values can be input. For the condition the same value you input:
match cos <cos-value> [cos-value] ...
● Following command chooses IP Precedence class flow for QoS to form PREC class, at most
only 8 IP Precednece values can be input. For the condition the same value you input:
match ip_precedence <ip-precedence-value> [ip-precedence-value] ...
● Following command chooses DSCP class flow for QoS to form DSCP class, at most only 8
DSCP values can be input. For the condition the same value you input:
match dscp <dscp-value> [dscp-value] ...
● Following command chooses ACL class flow for QoS to form ACL class, and one Qo S can
only choose one ACL group that must be exsited:
match acl <acl-id>
For example one QoS 3 chooses DSCP value 20, 40, 45, and 60 as one DSCP class：
Switch(class-3)# match dscp 20 40 45 60
Switch(class-3)# show qos class 3
Under global CONFIG mode input following command to delete one QoS class：
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