Traffic Classifier

A traffic classifier is used to identify packets with certain features according to rules, and is the prerequisite and basis for providing differentiated services.

Context

By matching packets with the rules, the class-based QoS technology classifies packets according to certain rules and provides the same QoS level for traffic of the same type. In this manner, the class-based QoS technology provides differentiated services. A traffic classifier matches the packet header information with certain rules so that the packets sharing common features are grouped into one class.

Procedure

Create a traffic classifier.

Choose QoS > Traffic Management > Traffic Classifier in the navigation tree to open the Traffic Classifier page.

Click Create to open the Create Traffic Classifier page.

Table 1 describes the parameters on the Create Traffic Classifier page.

**Table 1** Create Traffic Classifier
Parameter	Description
Traffic classifier name	Indicates the name of a traffic classifier. This parameter is mandatory.
Relationship between rules	Indicates the relationship between rules, which can be AND or OR. By default, the value is OR.

Set parameters.
Click OK.

Modify Traffic Classifier
1. Choose QoS > Traffic Management > Traffic Classifier in the navigation tree to open the Traffic Classifier page.
2. Click to open the Modify Traffic Classifier page.
  NOTE:
  - Table 1 describes the parameters on the Modify Traffic Classifier page.
  - The traffic classifier name cannot be modified.
3. Set parameters.
4. Click OK.
Delete a traffic classifier.
1. Choose QoS > Traffic Management > Traffic Classifier in the navigation tree to open the Traffic Classifier page.
2. Select a record that you want to delete and click Delete. The system asks you whether to delete the record.
  NOTE:
  When you delete a traffic classifier, the matching rule in the traffic classifier is also deleted.
3. Click OK.

Add rules to the traffic classifier.

Choose QoS > Traffic Management > Traffic Classifier in the navigation tree to open the Traffic Classifier page.

Select the traffic classifier in which rules need to be added and click Create to open the Add Rules of Classifier page.

Table 2 describes the parameters on the Add Rules of Classifier page.

**Table 2** Add Rules of Classifier
Parameter		Description
Traffic classifier name		Indicates the name of a traffic classifier, which is set by the user.
Relationship between rules		Indicates the relationship between rules, which is set by the user.
Match all packets		Indicates that all the packets are matched.
Match discarded packets		Indicates that discarded packets are matched.
Match L2 protocol		Indicates the matching rule based on the Layer 3 protocol type (Layer 2 encapsulated protocol fields), including: arp Indicates the ARP protocol. ip Indicates the IP protocol. mpls Indicates the MPLS protocol. rarp Indicates the RARP protocol.
Match IP protocol		Indicates the matching IP protocol, which can be IPv4 or IPv6.
Match Priority	DSCP	Indicates the matching rule based on DSCP priorities.
	VLAN 802.1p	Indicates the matching rule based on 802.1p priorities of VLAN packets.
	IP priority	Indicates the value of the IP precedence. When the relationship between rules in the traffic classifier is OR, you can configure up to eight IP precedences in a traffic classifier. If packets match one IP precedence, they match the traffic classifier. When the relationship between rules in the traffic classifier is And, if you configure multiple IP precedences, only the first IP precedence takes effect.
	Inner VLAN 8021.p	Indicates the matching rule based on 802.1p priorities in inner VLAN tags of QinQ packets.
	mpls-exp	Indicates the EXP priority of MPLS packets. When the relationship between rules in the traffic classifier is OR, you can configure up to eight EXP priorities in a traffic classifier. If packets match one EXP priority, they match the traffic classifier. When the relationship between rules in the traffic classifier is And, if you configure multiple EXP priorities, only the first EXP priority takes effect.
Match VLAN	Start VLAN	Indicates the start outer VLAN ID.
	End VLAN	Indicates the end outer VLAN ID.
	Inner VLAN	Indicates the inner VLAN ID.
Match MAC	Source MAC	Indicates the matching rule based on source MAC addresses. The value is in the format H-H-H. Each H represents four hexadecimal digits.
	Destination MAC	Indicates the matching rule based on destination MAC addresses. The value is in the format H-H-H. Each H represents four hexadecimal digits.
	Mask	Indicates the mask of the MAC address. The value is in the format H-H-H. Each H represents four hexadecimal digits. If this parameter is not specified, the default value is FFFF-FFFF-FFFF. That is, all the MAC addresses are matched.
Match Interface	Outgoing	Indicates the matching rule based on outbound interfaces, for example, GigabitEthernet1/0/1. NOTE: This matching rule takes effect for only unicast packets. The outbound interface for classifying traffic must be different from the inbound interface where the traffic policy is applied; otherwise, the traffic policy cannot be used.
Match Interface	Incoming	Indicates the matching rule based on inbound interfaces, for example, GigabitEthernet1/0/1. NOTE: If both the Outgoing and Incoming interfaces are specified, the interfaces cannot be the same.
Match ACL	ACL IPv4	Indicates the matching rule based on IPv4 ACLs. Click Select ACL to select ACLs. You can select multiple ACLs.
Match ACL	ACL IPv6	Indicates the matching rule based on IPv6 ACLs. Click Select ACL to select ACLs. You can select multiple ACLs.

NOTE:

The sequence of matching rules in a traffic classifier affects the flow matching sequence.

For example, if the matching rules based on 802.1p priorities of VLAN packets and inner VLAN tags are set, the system first matches flows with 802.1p priorities of VLAN packets and then inner VLAN tags. If multiple matching rules are configured, the system matches flows according to the matching rules one by one.

Set parameters.
Click OK.

Delete rules.
1. Choose QoS > Traffic Management > Traffic Classifier in the navigation tree to open the Traffic Classifier page.
2. Select a record that you want to delete and click Delete. The system asks you whether to delete the record.
3. Click OK.