Advanced Traffic Management Guide K/KA/KB.15.15

• Source port on the switch
• VLAN ID
• Traffic marking options are as follows:
Setting the Layer 2 802.1p priority value in VLAN-tagged and untagged packet headers•
• Setting the Layer 3 Differentiated Services Codepoint (DSCP) bits in the ToS byte of IPv4
packet headers and Traffic Class byte of IPv6 headers.
Classifier-based QoS
Starting in release K.14.01, classifier-based QoS operation provides additional QoS actions on
a per-port and per-VLAN basis.
• Classifier-based match criteria on inbound IPv4/IPv6 traffic include:
IP source address (IPv4 and IPv6)•
• IP destination address (IPv4 and IPv6)
• IP protocol (such as ICMP or SNMP)
• Layer 3 IP precedence bits
• Layer 3 DSCP codepoint
• Layer 4 UDP/TCP application port
• VLAN ID
• Classifier-based QoS policy actions on matching IPv4/IPv6 packets are as follows:
Setting Layer 2 802.1p priority value (class of service) in VLAN-tagged and untagged
packet headers
•
• Setting the Layer 3 IP precedence bits
• Setting the Layer 3 Differentiated-Services Codepoint (DSCP) bits
• Rate limiting inbound traffic on port and VLAN interfaces
QoS packet classification
To manage network traffic using QoS features, you must first classify (select) the packets you want
to manage. You can use any combination of the following packet classification methods to select
packets for QoS management:
• Globally configured, switch-wide classification criteria
• Classifier-based match criteria applied to inbound traffic on specific port and VLAN interfaces
NOTE: Starting in software release K.14.01, global and classifier-based QoS policies support
IPv6 and IPv4 packet classification.
Using multiple global criteria
NOTE: HP recommends that you configure a minimum number of global QoS classifiers to
prioritize a specific packet type. Increasing the number of enabled global QoS classifiers increases
the complexity of possible outcomes and consumes switch resources.
The switches covered in this guide provide six types of globally-configured QoS classifiers (match
criteria) to select packets for QoS traffic marking.
When multiple, global QoS classifiers are configured, a switch uses the highest-to-lowest search
order shown in the following table to identify the highest-precedence classifier to apply to any
240 Quality of Service: Managing bandwidth effectively