Intel 480T, User Manual

Page: 136 / 367

134
C H A P T E R 8 Quality of Service (QoS)
• Implicit packet class of service information, such as 802.1p or
DiffServ (IP TOS)
• Physical/logical configuration (physical source port or VLAN
association)
A QoS profile is assigned to a desired traffic grouping to form a
QoS policy. In the event that a given packet matches two or more
grouping criteria, there is a predetermined precedence for which
traffic grouping will apply. In general, the more specific traffic
grouping takes precedence. By default, all traffic groupings are
placed in the QoS profile named Qp1. The supported traffic
groupings and their options by QoS mode are listed in Table 32. The
groupings are listed in order of precedence (highest to lowest).
IP-Based Traffic Groupings
IP-based traffic groupings are based on any combination of:
• IP source or destination address
• TCP/UDP or other Layer 4 protocol
Table 32: Traffic Groupings by QoS Mode
IP Information (Access Lists) Groupings
• Access list precedence determined by user
configuration
• IP destination
Destination Address MAC-based Groupings
• Permanent
• Dynamic
• Blackhole
• Broadcast/unknown rate limiting
Packet Priority Groupings
• DiffServ (IP TOS)
Physical/Logical Groupings
• Source port
• VLAN